Answer:
70s-10 s=7
Step-by-step explanation:
first you want to multiply 7 * 10 which will give you 70 s -10 then you want to divide the 70 by 10 and you will get seven as your answer
Answer:
Step-by-step explanation:
7(10s-10)
= 70s - 70
A landscaper installed a circular sprinkler system using 50.25 feet of copper tubing to create the circle. To the nearest whole foot, what is the diameter of the circular sprinkler
Answer:
4 foot
Step-by-step explanation:
√50.25 / 3.1416 = 4
The diameter of the circular sprinkler is 16 feet.
Explanation:To find the diameter of the circular sprinkler, we can use the formula for the circumference of a circle: C = πd, where C is the circumference and d is the diameter. In this case, we are given the length of the copper tubing used, which is equal to the circumference. So we can rearrange the formula to solve for the diameter: d = C/π. Plugging in the given values, we have d = 50.25/π. Using the value of π as approximately 3.14, we can calculate the diameter to the nearest whole foot.
d ≈ 50.25/3.14 ≈ 16.01 feet
Therefore, the diameter of the circular sprinkler to the nearest whole foot is 16 feet.
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Quadrilateral ABCD is dilated by a scale factor of 1 over 3 centered around (1, 2). Which statement is true about the dilation?
segment B prime D prime will run through (1, 2) and will be shorter than segment BD.
segment B prime D prime will run through (1, 2) and will be longer than segment BD.
segment B prime D prime will be parallel to segment BD and will be shorter than segment BD.
segment B prime D prime will be parallel to segment BD and will be longer than segment BD.
Note: Since you missed to add the figure. So, after a little research I am kind of able to find the figure and hence, assuming it as a reference. Hence, I am attaching the figure and solution of that figure is also visible in the same figure. Please check the attached figure (a)
Answer:
Segment B'D' will be parallel to segment BD and will be shorter than segment BD. Please see the attached figure (a) for better understanding.
Step-by-step explanation:
As we know that there are certain rules when a quadrilateral is dilated by a certain scale centered around a certain point.
So,
Let suppose P(a, b) is the point.
The dilation rule by a scale factor of 1 over 3 or (1/3) centered around (1, 2) is
P(a, b) → [tex]P(\frac{x+2}{3}, \frac{y+4}{3})[/tex]
Hence,
A(1, 2) → A'(1, 2)
B(2, 3) → B'(4/3, 7/3)
C(4, 2) → C'(2, 2)
D(2, 1) → D'(4/3, 5/3)
The attached figure show that if we draw the all these points in the coordinate plan i.e. A(1, 2), B(2, 3), C(4, 2), D(2, 1) and A'(1, 2), B'(4/3, 7/3), C'(2, 2), D'(4/3, 5/3), we can determine that Segment B'D' will be parallel to segment BD and will be shorter than segment BD.
Keywords: dilation, quadrilateral, segment
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Answer: C) segment B prime D prime will be parallel to segment BD and will be shorter than segment BD.
Students were asked to write 6x^5 + 8x-3x^3+7x^7 in standard form
Answer:
The standard form is [tex]7x^7 +6x^5-3x^3 + 8x[/tex]
Step-by-step explanation:
Given:
[tex]6x^5 + 8x-3x^3+7x^7[/tex]
To Find :
standard form of [tex]6x^5 + 8x-3x^3+7x^7[/tex]
Solution:
A polynomial is in standard form when its term of highest degree is first, its term of 2nd highest is 2nd etc.
In order to write any polynomial in standard form, you look at the degree of each term. You then write each term in order of degree, from highest to lowest, left to write.
Now lets check the degree of each term in the polynomial
The degree of 6x is 5
The degree of 8x is 1
The degree of 3x is 3
The degree of 7x is 7
Now rewrite the polynomial in the order of the degree, from highest to lowest
[tex]7x^7 +6x^5-3x^3 + 8x[/tex]
Aaron is going to a carnival that has games and rides. Each game costs $2.75 and each ride costs $4.75. Aaron spent $20.50 altogether at the carnival and the number of games he played is twice the number of rides he went on. Determine the number of games Aaron played and the number of rides Aaron went on.
Answer:
Step-by-step explanation:
2.75g + 4.75r = 20.50
g = 2r
2.75(2r) + 4.75r = 20.50
5.50r + 4.75r = 20.50
10.25r = 20.50
r = 20.50 / 10.25
r = 2 <==== Aaron went on 2 rides
g = 2r
g = 2(2)
g = 4 <==== Aaron played 4 games
check...
2.75g + 4.75r = 20.50
2.75(4) + 4.75(2) = 20.50
11 + 9.5 = 20.50
20.50 = 20.50 (correct)
In the 2006 Winter Olympics, Sweden won 3 medals more than China. Germany
secured one more than twice the number of medals bagged by sweden. It 54
medals were won in all, how many medals did Germany secure?
Final answer:
To find out how many medals Germany secured in the 2006 Winter Olympics, we denote the number of medals Sweden won as S and create an equation based on the problem's description. Solving for S, we find that Sweden won 14 medals, so Germany, with one more than twice the number of Sweden's medals, secured 29 medals in total.
Explanation:
The question requires us to solve a problem that involves understanding and creating equations based on the given information.
Let's denote the number of medals Sweden won as S. According to the problem, China won S - 3 medals, and Germany won 2S + 1 medals. The total number of medals won by all three countries is 54, so the equation to represent this information is:
S + (S - 3) + (2S + 1) = 54
By combining like terms, we get:
4S - 2 = 54
Now, we will solve for S:
4S = 56 ⇒ S = 14
Now that we know Sweden won 14 medals, we can determine the number of medals Germany secured, which is 2S + 1:
2(14) + 1 = 29
Therefore, Germany secured 29 medals in the 2006 Winter Olympics.
You want to put $2500 in a simple interest account. it has 4% Annual interest rate how long will it take you to earn $200 in interest?
Answer:
2 years
4% of 2500 is 100
So 100x2 years would be 200
Answer:
Step-by-step explanation:
SI = PRT/100
$200 = 2500 * 4*T/100
200 *100 / 2500 *4 = T
T = 200 * 100 /2500*4 = 2
T = 2 years
Find a polynomial function of least degree having only real coefficients, a leading coefficient of 1, and roots of 2-√6 , 2+ √6 , and 7-i
Answer:
[tex]x^{4} -18x^{3}+104x^{2} -172x-100[/tex]
Step-by-step explanation:
The 3 roots are given out of which 2 are real and 1 is imaginary. For a polynomial of least degree having real coefficients, it must have a complex conjugate root as the 4th root. Therefore, based on 4 roots, the least degree of polynomial will be 4. Finding the polynomial having leading coefficient=1 and solving it based on multiplication of 2 quadratic polynomials, we get:
[tex]\\\\x_{1} = 2-\sqrt{6} \\x_{2} = 2+\sqrt{6} \\x_{3}=7-i \\x_{4}=7+i \\\\P(x)=1(x-x_{1})(x-x_{2} )(x-x_{3} )(x-x_{4} ) \\\\=(x-(2-\sqrt{6}))( x-(2+\sqrt{6} )) (x-(7-i))( x-(7+i))\\=((x-2)+\sqrt{6})( ( x-2)-\sqrt{6} ) ((x-7)+i)( (x-7)-i)\\=((x-2)^{2} -(\sqrt{6} )^{2} )((x-7)^{2}-(i)^{2})\\=(x^{2} -4x-2)(x^{2} -14x+50)\\=x^{4} -18x^{3}+104x^{2} -172x-100\\[/tex]
Answer:
X^4-16x^3+73x^2-30x-250
Step-by-step explanation:
The ratio of two complementary angles is 7:2. What is the measure, in degrees, of the larger angle?
Answer:
70 degrees
Step-by-step explanation:
Complementary angles sum up to 90.
To find the larger angle, you find the total of the values in the ratio, divide the larger value of the ratio by the total and multiply it by 90.
(7/7+2)×90=7/9×90
=7×10
=70
OR
Write an equation:
7x+2x=90
9x=90
x=10
Then multiply x by the larger value.
7x=7 (10)=70
Given: ∆AFD, m ∠F = 90°
AD = 14, m ∠D = 30°
Find: Area of ∆AFD
Answer:
[tex]\frac{49\sqrt3}{2}[/tex]
Step-by-step explanation:
30 60 90 Right Trianlge.
The car is purchase for $18,000 after each year the resell value decreases by 25% what will the resale value be after three years
Answer:
18000×75÷100 =13500 ×3 =40500 .
1. Find the value of each expression. Show your work.
(a) 1.22
(b) 23 +17 - 3.4
(c) 9 +33
Answer:
ASAP PLS 15 points
Answer: A) 1.44 B) 13 C) 3
Step-by-step explanation:
A) 1.2 * 1.2 =1.44
B) (8) +17 - (12)= (8+17) -12= (25)- (12)= 13
C) (9*9) / (3*3*3)= (81) / (27)= 3
Emma has two 10$ bills three 5$ bills and two 1$ bill how much more money does she need to buy a game that costs 45$ ?explain.
Answer:
She needs $8 more to buy a game that cost $45
Step-by-step explanation:
10 * 2 = 20
5 * 3 = 15
1 * 2 = 2
20+15+2 = 37
45-37 = $8
She needs $8 more to buy a game that cost $45
Math word problem we need help?
The total profit is :$37.46. Number of boxes for pop B to purchase more is 56 boxes.
Step-by-step explanation:
1.
Pop B number =36
Remaining Pop B after meeting = 36-17 =19
Amount obtained after selling remaining Pop B = 19* 0.75 = $14.25
Pop A number =75
Remaining Pop A after meeting = 75-8 =67
Amount obtained after selling pop A = 67*0.5 =$33.5
Profit in Pop B = $14.25-$3.79 =$10.46
Profit in Pop A =$33.5 -$6.50 = $27
Total profit after sell of Pop A and B = $10.46+$27 = $37.46
2.
The target profit is $250
Subtracting profit meet = $250 - $ 37.46 =$212.54
Profit to be attained by the sell of pop B only should be =$212.54
Selling price of pop B per box is $3.79
Number of boxes for pop B to purchase more will be;
$212.54/ $3.79 = 56.08 ⇒ 56 more boxes
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Type the correct answer in each box. Use numerals instead of words. If necessary, use / for the fraction bar.
Determine the equation for the parabola graphed below.
y =
x2 +
x +
Answer:
[tex]\large\boxed{y=\dfrac{1}{2}x^2-2x+1}[/tex]
Step-by-step explanation:
The vertex form of an equation of a parabola:
[tex]y=a(x-h)^2+k[/tex]
(h, k) - vertex
a - leading coefficient in equation y = ax² + bx + c
From the grap we can read coordinates of the vertex (2, -1) and y-intercept (0, 1).
Therefore h = 2, k = -1
Put the values of h, k and coordinates of the y-intercept to the equation of parabola:
[tex]1=a(0-2)^2-1[/tex] add 1 to both sides
[tex]1+1=a(2)^2-1+1[/tex]
[tex]2=4a[/tex] divide both sides by 4
[tex]\dfrac{2}{4}=\dfrac{4a}{4}\\\\\dfrac{1}{2}=a\to a=\dfrac{1}{2}[/tex]
Therefore we have the equation:
[tex]y=\dfrac{1}{2}(x-2)^2-1[/tex]
Convert to the standard form:
[tex]y=\dfrac{1}{2}(x-2)^2-1[/tex] use (a - b)² = a² - 2ab + b²
[tex]y=\dfrac{1}{2}(x^2-2(x)(2)+2^2)-1[/tex]
[tex]y=\dfrac{1}{2}(x^2-4x+4)-1[/tex] use the distributive property
[tex]y=\dfrac{1}{2}x^2-\dfrac{1}{2}\cdot4x+\dfrac{1}{2}\cdot4-1[/tex]
[tex]y=\dfrac{1}{2}x^2-2x+2-1[/tex] combine like terms
[tex]y=\dfrac{1}{2}x^2-2x+1[/tex]
how to solve 4x + 7 = -2x + 19
subtract 7 from both sides
4x = -2x + 12
add 2x to both sides
6x = 12
divide both sides by 6
x = 2
Which congruence theorems can be used to prove ΔABR ≅ ΔACR? Select three options
Answer:
SAS , ASA, SSS
Step-by-step explanation:
SAS , side A= side A . Angle B= Angle C, side R= side R
ASA, Angle A= Angle A . Side B= side C, Angle R= Angle R
SSS
side A= side A . Side B= side c, side R= side R
A square pyramid has a base area of 36 ft2. The pyramid’s total surface area is 144 ft2.
Answer:
The area of each triangle face is 27 square feet .
Step-by-step explanation:
Given as :
The base area of square pyramid = A = 36 square feet
The total surface area of square pyramid = TSA = 144 square feet
Let The area of each triangle face = x square feet
Now, According to question
Total surface Area of square pyramid = Base area of square pyramid + Area of four triangle faces
Or, TSA = A + 4 × x
Or, 144 ft² = 36 ft² + 4 × x ft²
Or, 4 × x = 144 ft² - 36 ft²
Or 4 × x = 108 ft²
∴ x = [tex]\dfrac{108}{4}[/tex]
i.e x = 27 ft²
So, The area of each triangle face = x = 27 square feet
Hence, The area of each triangle face is 27 square feet . Answer
find the domain of the function below if the domain is {-1,0,2} f(x)=x^2 -2x+3
Answer:
The Range is {3, 6}.
Step-by-step explanation:
The correct question is
Find the range of the function below if the domain is {-1,0,2} f(x)=x^2 -2x+3
we know that
The domain represents all possible values of x.
The range represents all possible values of f(x)
Substitute all of the possible x-values (domain) into the formula to find all possible f(x) values (the range).
For x=-1
[tex]f(-1)= (-1)^{2} - 2(-1) + 3[/tex]
[tex]f(-1)=1+2+ 3[/tex]
[tex]f(-1)=6[/tex]
For x=0
[tex]f(0)= (0)^{2} - 2(0) + 3[/tex]
[tex]f(0)=0-0+ 3[/tex]
[tex]f(0)=3[/tex]
For x=2
[tex]f(2)= (2)^{2} - 2(2) + 3[/tex]
[tex]f(2)=4-4+ 3[/tex]
[tex]f(2)=3[/tex]
therefore
The Range is {3, 6}.
Which statements are true about the ordered pair
-1, 5) and the system of equations?
ſ+y=4
1
-Y= -6
Select each correct answer.
The ordered pair (-1, 5) is a solution to the first equation because it makes the first
equation true
The ordered pair (-1, 5) is a solution to the second equation because it makes the
second equation true.
The ordered pair (-1, 5) is not a solution to the system because it makes at least one
of the equations false.
The ordered pair (-1, 5) is a solution to the system because it makes both equations true
Answer:
-The ordered pair (-1, 5) is a solution to the first equation because it makes the first equation true.
-The ordered pair (-1, 5) is a solution to the second equation because it makes the second equation true.
-The ordered pair (-1, 5) is a solution to the system because it makes both equations true
Step-by-step explanation:
The correct question is
Which statements are true about the ordered pair (−1, 5) and the system of equations?
x+y=4
x−y=−6
we know that
If a ordered pair is a solution of a equation, then the ordered pair, must satisfy the equation (makes the equation true)
If a ordered pair is a solution of the system of equations, then the ordered pair, must satisfy the equations of the system (makes both equations true)
we have
[tex]x+y=4[/tex] ----> first equation
[tex]x-y=-6[/tex] ----> second equation
step 1
Verify if the ordered pair satisfy the first equation
Substitute the values of x and y of the ordered pair in the first equation
For x=-1, y=5
[tex]-1+5=4[/tex]
[tex]4=4[/tex] ---> is true
The ordered pair satisfy the first equation
so
The ordered pair is a solution to the first equation because it makes the first equation true
step 2
Verify if the ordered pair satisfy the second equation
Substitute the values of x and y of the ordered pair in the second equation
For x=-1, y=5
[tex]-1-5=-6[/tex]
[tex]-6=-6[/tex] ---> is true
The ordered pair satisfy the second equation
so
The ordered pair is a solution to the second equation because it makes the second equation true
therefore
The ordered pair (-1, 5) is a solution to the system because it makes both equations true
I need help finding what x is
Answer:
Therefore the value of x is 4.
Step-by-step explanation:
Given:
AO = 5x - 8
BO = 3x
AM ≅ BM
To Find :
x = ?
Solution:
In Δ AMO and Δ BMO
AM ≅ BM ……….{Given}
∠ AMO ≅ ∠ BMO …………..{measure of each angle is 90° given}
MO ≅ MO ……….{Reflexive property}
ΔAMO ≅ Δ BMO ….{ By Side-Angle-Side test}
∴ AO ≅ BO ...{corresponding sides of Congruent triangles or CPCT}
on substituting the values we get
[tex]5x-8=3x\\\\5x-3x=8\\\\2x=8\\\\x=\frac{8}{2}=4[/tex]
Therefore the value of x is 4.
if x-1 is a factor of P(x)=x^3- 5x^2 + 7x-3 which of the following represents the complete factorization for P(x)?
Answer:
P(x) = (x-1)² (x-3)
Step-by-step explanation:
P(x)=x³- 5x² + 7x-3 = x² (x-1) - 4x(x-1) + 3(x-1) = (x²-4x+3)(x-1)
P(x) = (x-1)(x-3)(x-1) = (x-1)² (x-3)
What kind of molecule is represented in the diagram?
Fatty Acid
Glycerol
Fatty Acid
Fatty Acid
A. A nucleic acid
B. A lipid
C. A nucleotide
D. A carbohydrate
Answer:
A lipid
Step-by-step explanation:
When 1 "Glycerol "and 3"Fatty Acids" form a bond the new molecule is called "Triglyceride" which is a type of "Lipid"
Graph the linear equation find three points that solves the equation 2y=5x+11
Answer:
AttachmentStep-by-step explanation:
Convert to the slope-intercept form (y = mx + b):
[tex]2y=5x+11[/tex] divide both sides by 2
[tex]\dfrac{2y}{2}=\dfrac{5x}{2}+\dfrac{11}{2}\\\\y=\dfrac{5}{2}x+\dfrac{11}{2}[/tex]
We choose any three x values and calculate the y value:
for x = -1
[tex]y=\dfrac{5}{2}(-1)+\dfrac{11}{2}=-\dfrac{5}{2}+\dfrac{11}{2}=\dfrac{6}{2}=3\to A(-1,\ 3)[/tex]
for x = 1
[tex]y=\dfrac{5}{2}(1)+\dfrac{11}{2}=\dfrac{5}{2}+\dfrac{11}{2}=\dfrac{16}{2}=8\to B(1,\ 8)[/tex]
for x = -3
[tex]y=\dfrac{5}{2}(-3)+\dfrac{11}{2}=-\dfrac{15}{2}+\dfrac{11}{2}=-\dfrac{4}{2}=-2\to C(-3,\ -2)[/tex]
Mark the points on the coordinate plane and draw a line through the given points.
After completing the fraction division 8 divided by 1/6, Patel used the multiplication below to check his work. 1/48 x 6 = 1/48 x 6/1 = 6/48 = 1/8 which is the most accurate description of patels work? A. Patel found the correct quotient and checked his work using multiplication correctly. B. Patel found the correct quotient but checked his work using multiplication incorrectly. C. Patel found an incorrect quotient but checked his work using multiplication correctly. D. Patel found an incorrect quotient and checked his work using multiplication incorrectly.
Answer:
D. Patel found the incorrect quotient and checked his work using multiplication incorrectly.
Step-by-step explanation:
The dividend is [tex]8,[/tex] the divisor is [tex]\dfrac{1}{6}.[/tex] Divide the dividend by the divisor (division by fraction means multiplication by its reciprocal):
[tex]8\div \dfrac{1}{6}=8\times \dfrac{6}{1}=8\times 6=48,[/tex]
so the quotient is 48, not [tex]\dfrac{1}{48}.[/tex]
To check the answer, Patel has to multiply the quotient by the divisor to get the dividend. Check answer:
[tex]48\times \dfrac{1}{6}=\dfrac{48}{6}=8[/tex]
Hence, Patel found the incorrect quotient and checked his work using multiplication incorrectly.
The most accurate description of Patel's work is option D. Patel found an incorrect quotient and checked his work using multiplication incorrectly. therefore, option D. Patel found an incorrect quotient and checked his work using multiplication incorrectly.
Patel initially calculated 8 divided by 1/6 as 1/48, which is incorrect.
The correct quotient is 48.
When Patel multiplied 1/48 by 6, he got 1/8, which is also incorrect.
The correct result should be 48, not 1/8.
So, Patel's division was incorrect, and his check using multiplication was also incorrect.
In summary, Patel made an error in the initial division and didn't accurately check his work using multiplication, leading to an incorrect final result in both cases.
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Bryson’s dad is 38 years old. If this is four years less than three times Bryson’s age, how old is Bryson?
Answer:
Bryson’s age is 14 years
Step-by-step explanation:
Let
x ----> Bryson’s age
we know that
Bryson’s age multiplied by 3 minus 4 must be equal to 38
so
The linear equation that represent this situation is
[tex]3x-4=38[/tex]
solve for x
Adds 4 both sides
[tex]3x=38+4[/tex]
[tex]3x=42[/tex]
Divide by 3 both sides
[tex]x=14[/tex]
therefore
Bryson’s age is 14 years
A worker at a snack stand opened a new box of cups. The first day he used 30 cups , the second day the worker used 15 percent of the remaining cups. A total of 90 cups were used the second day.what was the original amount of cups in the box before any were used?
plz help asap will give u brainliest :)
Answer:
Step-by-step explanation:
the first day he used 30 cups
the second day he used 15% of the remaining cups...a total of 90 cups were used on second day.
so 15%of the remaining cups = 90.....so if u let x be the total cups, then the remaining cups would be x - 30
15% of (x - 30) = 90.....turn ur percent to a decimal..." of " means multiply
0.15(x - 30) = 90
0.15x - 4.5 = 90
0.15x = 90 + 4.5
0.15x = 94.5
x = 94.5 / 0.15
x = 630 total cups <==
lets check..
start with 630 cups....used 30 the first day....leaving u with 600 cups....15% of the remaining cups = 90.....so 15% of 600 = 90....lets check it
15%of 600 = 0.15(600) = 90...yep, thats correct....there were 630 cups in the new un-opened box
Answer:
630
Explanation:
15% * number of remaining cups = 90
15% * (x-30) = 90
0.15(x-30) = 90
0.15x - 4.5 = 90
0.15x = 94.5
x = 630
if oak plywood costs $56.00/sheet sq ft. how much is 17 sq ft.
Answer:
$952
Step-by-step explanation:
I don't know why sheet is after 56, but I think they just want you to multiply 57 and 17.
Help please i need help lollolol
Answer:
Oh it is C
Step-by-step explanation:
Answer:
40 miles per hour
Step-by-step explanation:
1 hour=3600 seconds
(1/4)/22.5=x/3600
cross product
22.5*x=(1/4)(3600)
22.5x=3600/4
22.5x=900
x=900/22.5
x=40
Please help!! Which table shows a proportional relationship between x and y?
Answer: The second table
Step-by-step explanation:
For the table to show proportional relationship between x and y , then they must have a common ratio. that is x/y must be the same throughout
Table 1
[tex]x_{1}[/tex] = 1 [tex]y_{1}[/tex] = 2
[tex]x_{2}[/tex] = 3 [tex]y_{2}[/tex] = 5
[tex]x_{3}[/tex] = 4 [tex]y_{3}[/tex] = 8
[tex]x_{4}[/tex] = 7 [tex]y_{4}[/tex] = 14
[tex]\frac{x_{1}}{y_{1}}[/tex] = 1/2
[tex]\frac{x_{2}}{y_{2}}[/tex] = 3/5
[tex]\frac{x_{3}}{y_{3}}[/tex] = 4/8 = 1/2
[tex]\frac{x_{4}}{y_{4}}[/tex]= 7/14 = 1/2
Since the ratio is not the same throughout , then x and y are not proportional
Table 2
[tex]x_{1}[/tex] = 7 [tex]y_{1}[/tex] = 1
[tex]x_{2}[/tex] = 14 [tex]y_{2}[/tex] = 2
[tex]x_{3}[/tex] = 28 [tex]y_{3}[/tex] = 4
[tex]x_{4}[/tex] = 35 [tex]y_{4}[/tex] = 5
[tex]\frac{x_{1}}{y_{1}}[/tex] = 7/1 = 7
[tex]\frac{x_{2}}{y_{2}}[/tex] = 14/2 = 7
[tex]\frac{x_{3}}{y_{3}}[/tex] = 28/4 = 7
[tex]\frac{x_{4}}{y_{4}}[/tex]= 35/5 = 7
Since the ratio is the same throughout , it means that x and y are proportional.
Doing the same for table 3 and 4 , x and y are not proportional
what is the solution to y=x+2 and x=-3
Answer:
x=-3, y=-1. (-3, -1).
Step-by-step explanation:
y=x+2
y=-3+2=-1