What should be the first step in adding these equations to illuminate y? 3x+4y=8 + 6x-2y=9
A. Multiply the top equation by two
B. Multiply the top equation by six
C. Multiply the bottom equation by three
D. Multiply the bottom equation by two
Answers
Answer:
D
Step-by-step explanation:
In this problem, we are adding the two equations and we want to get rid of y. To do this, we want one positive y and one negative y with the same coefficient because when we add the equations they will cancel each other out. The coefficient of the first equation's y is 4, so we want the second to be -4. The coefficient of the second equation's y is -2, and if we want it to be -4 we multiply it by -4/-2= 2, which is D. Once you do that you will get 4y and -4y in the first and second equations respectively and then you can add them to eliminate y!
Related Questions
the probabiltiy for snow today is 0.6 the probabiltiy foe anow tomorrrw of 0.4. the pr ability for snow both days is 0.1. fins the probability that it will snow at least one if the two days
Answers
Answer:
Step-by-step explanation:
1%
Answer:
1% I think. I used a calculator but sometime my calculator doesn’t work.
Explain what is pi and how many number it has
Answers
Answer:3.14
Step-by-step explanation: It has inf numbers it never ends
The sum of three numbers is -39.22. One of the numbers is 22.8. The other two numbers are equal to each other. What is the value of the other two numbers?
Answers
Answer:
The value of the other two numbers is 31.01
Step-by-step explanation:
Let the two numbers equal to each other be x
One of the numbers is 22.8
The sum of three numbers is -39.22.
So, x+x+22.8=-39.22
2x+22.8=-39.22
2x=-39.22-22.8
2x=-62.02
[tex]x=\frac{-62.02}{2}[/tex]
x=-31.01
Hence the value of the other two numbers is 31.01
(07.01)Amanda created a table to help her represent the sample space of spinning a spinner and flipping a coin
Result of spin
Result of coin tossRed Green
Yellow Blue
Heads
Red, heads Green, heads Yellow, heads Blue, heads
Tails
Red, tails Green, tails Yellow, tails Blue tails
What is the probability that the result of the spin is blue and the coin lands heads up?
2
8
3
8
1
8
4
8
Answers
Answer:
1/8
Step-by-step explanation:
i got it right
Rewrite the equation by completing the square.
x² + 4x = 0
Answers
Answer:
(x+2)^2 = 4
Step-by-step explanation:
x² + 4x = 0
Take the coefficient of the x term
4
Divide by 2
4/2 =2
Square it
2^2 =4
Add this to each side
x^2+4x+4 = 0+4
(x+4/2)^2 = 4
(x+2)^2 = 4
please help me understand and explain why it is that please
Answers
Quinn mailed four postcards that each cost $0.25, five letters that each cost $0.44, two large envelopes that each cost $0.80, and one small package for $5.10. Which cost on the list of mailing fees on Quinn’s receipt would skew the mean?
the cost of a postcard
the cost of a letter
the cost of a large envelope
the cost of the small package
Answers
Answer:
the cost of the small package
Step-by-step explanation:
I hope this is correct. I'm sorry if it's not...
Maria spent 19 days traveling in South America how many hours did she spent traveling in South America
Answers
Answer:
456 hours
Step-by-step explanation:
19x24
Find the surface area of the cone. Use 3.14 for pi and round to the nearest 10th. Diameter is 6ft and height is 7.6ft.
Answers
Answer:
105.2 ft²
Step-by-step explanation:
The diameter of the base of the cone is 6 ft which means its radius is:
r = d / 2 = 6 / 2 = 3 ft
Its height, h, is 7.6 ft.
The surface area of a cone is given as:
A = pi * r(r + √(h² + r²))
Therefore:
A = pi * 3(3 + √(7.6² + 3²))
A = pi * 3(3 + √(57.76 + 9))
A = pi * 3(3 + √(66.76))
A = 9.42(3 + 8.17)
A = 9.42 * 11.17 = 105.2214 ft²
Approximating to the nearest 10th, the surface area of the cone is 105.2 ft².
How many 4-digit numbers are multiples of at least one of these two numbers: 2; 5.
How many 4-digit numbers are multiples of both 2 and 5?
How many 4-digit numbers are neither multiples of 2 nor multiples of 5?
Answers
Answer:
I believe that there is 3087 multiples of 5
Step-by-step explanation:
Answer:
5400
Step-by-step explanation:
Find the slope of the line between these 2 points.
(6, −12), (15, −3)
Answers
Answer:
1
Step-by-step explanation:
The slope of the line can be found by
m = (y2-y1)/(x2-x1)
= (-3 - -12)/(15-6)
= (-3+12)/(15-6)
= 9/9
= 1
what is the area of the square units
Answers
Answer:
Step-by-step explanation:
area of square=5×5=25 u²
The figure below has one base
and eight lateral faces. Find its surface
area to the nearest whole number.
Answers
Answer: B
Total surface area = 320 m^2
Step-by-step explanation:
The figure is a combination of a cuboid and pyramid.
The Surface Area of a Pyramid When all side faces are the same:
[Base Area] + 1/2 × Perimeter × [Slant Length]
Let us use pythagorean theorem to calculate the slant length
Slant length = root(6^2 + 4^2)
Slant length = 7.2 m
Base area = 8 × 8 = 64 m^2
Perimeter = 8+8+8+8 = 32 m
Surface area of the pyramid will be
= 64 + ( 1/2 × 32 ) × 7.2
= 64 + 16 × 7.2
= 64 + 115.4
= 179.4 m^2
The surface area of the cuboid will be
LB + LH + BH = 8×8 + 8×5 + 8×5
= 64 + 40 + 40
= 144 m^2
Total surface area = 179.4 + 144
Total surface area = 323.4 m^2
= 320 m^2 to the nearest whole number.
please help me solve this quadratic equation
Answers
x = - 26.53197
Which of the following numbers can be expressed as a decimal that terminates? 3/2, 2/3, 3/4, 5/7
Answers
Answer:
3/2 and 3/4 are terminating decimals
Step-by-step explanation:
Terminating decimals are those whose decimals end.
3/2 = 1 .5
2/3 = .6666repeating
3/4 = .75
5/7 =.714285repeating
Answer:
3/2 and 3/4
Step-by-step explanation:
3/2=1.5
2/3= .6666...
3/4=.75
5/7=.7142...
So the only ones that terminate are 3/2 and 3/4
triangle feg is similar to ihj. what is the value of h
Answers
Answer:
what i dont get what ur trying to say
Step-by-step explanation:
Solve the equation.
5u - 10 = 70
Answers
Answer:
u = 16
Step-by-step explanation:
5u - 10 = 70
Add 10 to each side
5u -10 +10 = 70+10
5u = 80
Divide each side by 5
5u/5 = 80/5
u = 16
which box plot represents a data set with a lower quartile or 24 and an upper quartile of 42
Answers
The box plot that represents a data set with a lower quartile of 24 and an upper quartile of 42 from the given option is D(The bottom option on the right end).
What are quartiles?When we get data that can be compared relatively with each other, for finding quartiles, we arrange them in ascending or descending order.
Quartiles are then selected as 3 points such that they create four groups in the data, each group approximately possessing 25% of the data.
The lower quartile, also called the first quartile has approx 25% in its left partition, and on its right lies approx 75% of the data.Similarly, the second quartile (also called median) is approximately in mid of the data.The third quartile (also called the upper quartile) has approx 75% in its left partition, and on its right lies approx 25% of the data.Left to right is said in the assumption that data were arranged increasingly from left to right
Since we need to find the box plot that has a lower quartile of 24 and an upper quartile of 42, therefore, we need to find a box plot whose rectangle starts at 24 and ends at 42, from left to right.
Hence, the box plot that represents a data set with a lower quartile of 24 and an upper quartile of 42 from the given option is D(The bottom option on the right end).
Learn more about quartiles here:
brainly.com/question/9260741
#SPJ2
NEED ASAP!
Consider the following graph of an absolute value function.
a) rewrite the function as a piecewise function
b) which of the following absolute value functions represents the graph?
f(x)= |x+2| -1 or f(x)= |x+1| -2
c) describe the relationship between the absolute value function and the vertex of the graph
d) what is the line of symmetry of the graph?
Answers
The absolute value function can be expressed as a piecewise function. The correct absolute value function that represents the given graph is f(x) = |x + 2| - 1. The vertex of the graph is (-2, -1) and the line of symmetry is x = 2.
a) Rewrite the function as a piecewise function: The absolute value function can be expressed as a piecewise function by considering the different intervals where the expression inside the absolute value changes its sign. In this case, the function may be written as:
[tex]f(x) = \begin{cases} -(x + 2) - 1, & \text{if } x \leq -2 \\ (x + 2) - 1, & \text{if } x > -2 \end{cases}[/tex]
b) Which of the following absolute value functions represents the graph: To determine which of the given options matches the graph, we compare the expressions inside the absolute values with the piecewise function from part (a). In this case, the correct match is f(x) = |x + 2| - 1.
c) Describe the relationship between the absolute value function and the vertex of the graph: The vertex of the absolute value function f(x) = |x + h| + k is (-h, k). In this case, the vertex is (-2, -1). This means that the graph has been shifted two units to the left and one unit down.
d) What is the line of symmetry of the graph: The line of symmetry for an absolute value function of the form f(x) = |x + h| + k is the vertical line x = -h. In this case, the line of symmetry is x = -(-2) = 2. The graph is symmetric with respect to the line x = 2.
can someone help me really please
Answers
Answer:
A) .1
B) .5
C) .7
D) .7
E) 1.2
F) 1.9
G) 3.2
H) 3.6
I) 4.4
Step-by-step explanation:
There are 10 dashes between each number so when you reach a whole number and have to go beyond that point, just count the dashes which will give you your whole number, if you have one, and your decimal.
Which scatter plot would have a trend line with a negative y-intercept?
Answers
Answer:
B
Step-by-step explanation:
John was given a math equation. He completed it in 5 seconds. Is his answer correct? If it is, show how he got the answer. Show your work. See picture down below.
Answers
Answer:
His work is correct, easiest question in the world!LOL
Step-by-step explanation:
1+1= 2
1 bag in addition to 1 bag is 2 bags
Help me please again :))
Answers
Answer:
x= 15
Step-by-step explanation:
85 and 6x+5 form a straight line.
They sum to 180
85+ 6x+5 = 180
Combine like terms
90 +6x = 180
Subtract 90 from each side
90+6x-90 = 180-90
6x = 90
Divide each side by 6
6x/6 = 90/6
x =15
Answer: x = 15
Step-by-step explanation: since it's a straight line so it's 180 degrees
so 6x + 5 = 95
6x = 90
x = 15
Kendrick brought a 5 kilogram can of peanuts for $8.75. What is the unit price?
Answers
Answer:
$1.75 per can of peanuts
Step-by-step explanation:
$8.75/5=$1.75
If there are 6 hours in a school day, 5 school days in a week, 4 school weeks in
a month and 9 months in a school year, how many hours are there in a school
year?
hours in a school year
Answers
Answer:
40,516 hours
Step-by-step explanation:
.
Answer:
1,080
Multiply all of the numbers together
Will the area and perimeter be the same for a 12 by 12 square?
Pls explain why or why not
Answers
Answer:
No.
Step-by-step explanation:
For area you will multiply 12x12=144.
For the perimeter you will add 12+12=24
I hope this helps!
What is the value of the expression 6x (2.2+12.8)-4
Answers
Which graph best represents the cost to mail a package based on weight categories?
Plz help
Answers
Answer:
IV
Step-by-step explanation:
Since the cost is the same for weights in one interval, it will form a step function
Select three expressions that are equivalent to 2x(4x+8y) Please include explanation.
Will choose brainliest
Answers
Answer:
Its f,e,c
Step-by-step explanation:
Its correct because when u solve one side is 8x and the other is 16y
What is StartFraction negative 23 over 6 EndFraction minus StartFraction 7 over 3 EndFraction
Answers
Answer:
-37/6
Step-by-step explanation:
Answer:
A -37/6
Step-by-step explanation: