PLEASE HELP!!! WORTH 100 POINTS !!

What is the value of y and x?? Solve the answer and show a step by step solution!

Answer:

1 + 1.58i , 1 - 1.58i

Step-by-step explanation:

2x^2=4x-7

2x^2 - 4x + 7 = 0

x = [-(-4) +/- sqrt((-4)^2 - 4 * 2 * 7 )] / 2*2

= [ 4 +/- sqrt (16 - 56)] / 4

= [4 +/- sqrt (-40) ] / 4

= 1 +/- 6.32i / 4

= 1 + 1.58i  and 1 - 1.58i  (answer).

Answer:

[tex]\boxed{x = 1 \pm i\sqrt{\frac{5}{ 2}} }\\[/tex]

Step-by-step explanation:

2x² = 4x - 7

2x² - 4x + 7 =0

a = 2; b = -4; c = 7

[tex]y =\frac{-b\pm\sqrt{b^2-4ac}}{2a}\\[/tex]

[tex]=\frac{4\pm\sqrt{(-2)^2-4\times2\times7}}{2\times2}\\[/tex]

[tex]= 1 \pm\frac{\sqrt{16-56}}{4}\\[/tex]

[tex]= 1 \pm\frac{\sqrt{-40}}{4}\\[/tex]

[tex]= 1 \pm\frac{2i\sqrt{10}}{4}\\[/tex]

[tex]= 1 \pm\frac{i\sqrt{10}}{2}\\[/tex]

[tex]= 1 \pm i\sqrt{\frac{10}{4}}\\[/tex]

[tex]\boxed{= 1 \pm i\sqrt{\frac{5}{ 2}} }\\[/tex]

The graph of y = 2x² - 4x + 7 has a minimum at (1, 5). It never touches the x-axis, so both roots are imaginary.

The answers are:

[tex]FirstCarSpeed=41mph\\SecondCarSpeed=55mph[/tex]

To calculate the speed of the cars, we need to write two equations in order to create a relation between the two speeds and be able to calculate one in function of the other.

So, let be the first car speed "x" and the second car speed "y", writing the equations we have:

For the first car:

[tex]x_{FirstCar}=x_o+v*t[/tex]

For the second car:

We know that the speed of the second car travels 14 mph faster than the first car, so:

[tex]x_{SecondCar}=x_o+(v+14mph)*t[/tex]

Now, we already know that both cars met after 2 hours and 45 minutes, and the distance between A and B is 264 miles,  so, we can calculate the relative speed between both carsby the following way:

If the cars are moving towards each other the relative speed will be:

[tex]RelativeSpeed=FirstCarSpeed-(-SecondCarspeed)\\\\RelativeSpeed=x-(-x-14mph)=2x+14mph[/tex]

So , since we know that they covered a combined distance equal to 264 miles in 2 hours + 45 minutes, we  have:

[tex]2hours+45minutes=120minutes+45minutes=165minutes\\\\\frac{165minutes*1hour}{60minutes}=2.75hours[/tex]

Writing the equation:

[tex]264miles=(2x+14mph)*t\\\\264miles=(2x+14mph)*2.75hours\\\\2x+14mph=\frac{264miles}{2.75hours}\\\\2x=96mph-14mph\\\\x=\frac{82mph}{2}=41mph[/tex]

We have, the speed of the first car is equal to 41 mph.

Now, for the second car we have that:

[tex]SecondCarSpeed=FirstCarSpeed+14mph\\\\SecondCarSpeed=41mph+14mph=55mph[/tex]

So,  the speed of the second car is equal to 55 mph.

Hence, the answers are:

[tex]FirstCarSpeed=41mph\\SecondCarSpeed=55mph[/tex]

Have a nice day!

Answer:

x = - 7, x = 5

Step-by-step explanation:

To find the zeros equate f(x) to zero, that is

x² + 2x - 35 = 0

To factorise the quadratic

Consider the factors of the constant term (- 35) which sum to give the coefficient of the x- term (+ 2)

The factors are + 7 and - 5, since

7 × - 5 = 35 and 7 - 5 = + 2, hence

(x + 7)(x - 5) = 0

Equate each factor to zero and solve for x

x + 7 = 0 ⇒ x = - 7

x - 5 = 0 ⇒ x = 5

ANSWER

[tex]x = - 7 \: or \: x = 5[/tex]

EXPLANATION

The given function is

[tex]f(x) = {x}^{2} + 2x - 35[/tex]

To find the zeros, we equate the function to zero.

[tex] {x}^{2} + 2x - 35 = 0[/tex]

Split the middle term to obtain,

[tex]{x}^{2} + 7x - 5x- 35 = 0[/tex]

Factor by grouping:

[tex]{x}(x + 7) - 5(x + 7)= 0[/tex]

[tex](x + 7)(x - 5) = 0[/tex]

[tex](x + 7) = 0 \: or \: (x - 5) = 0[/tex]

.

[tex]x = - 7 \: or \: x = 5[/tex]

The approximate probability that both you and your friend will choose chocolate ice cream from seven different flavors is 1/49, or approximately 0.020408.

We are looking to find the probability that both you and your friend choose chocolate ice cream from a selection of 7 different flavors. Since the choice of ice cream is independent for each person, we can calculate the probability of both events occurring by multiplying the probability of each event occurring individually.

The probability that one person chooses chocolate ice cream is 1 out of 7, or approximately 0.142857. To find the probability that both you and your friend choose chocolate ice cream, we multiply the individual probabilities:

Probability of you choosing chocolate: 1/7

Probability of your friend choosing chocolate: 1/7

Combined probability: 1/7 x 1/7 = 1/49

Therefore, the approximate probability that both you and your friend choose chocolate ice cream is 1/49, or approximately 0.020408.

What you did in the graph was correct. Essentially, all you have to do to achieve a negative slope is either make the rise negative or the run negative (make sure not to do both, as the negatives would cancel out and make a normal line)

Answer: First option.

Step-by-step explanation:

 To simplify the polynomial [tex]2x^2y + 8x^3 - xy^2 - 2x^3 + 3xy^2 + 6y^3[/tex] you need to add the like terms, then you get:

[tex]=2x^2y+6x^3+2xy^2+6y^3[/tex]

Now, you know that Raj put this polynomial in standard form with the last term being 6y³, this means that he ordered it in descending order of "x" power and in ascending order of "y" power:

[tex]=6x^3+2x^2y+2xy^2+6y^3[/tex]

You can observe that the first term of the polynomial  that Raj ended up with, is:

[tex]6x^3[/tex]

Answer:

The answer would b A

Answer:

d o the formula Ltimes W divided by 2

Step-by-step explanation:

Answer:

Area of triangle = 44.104 cm²

Step-by-step explanation:

Formula:-

Area of triangle = bh/2

where b - Base  and h - Height

To find the height of triangle

Let h be the height of triangle then we can write,

Sin 63 = h/11

h = 11 * sin 63 = 11 * 0.891 = 9.801 cm

To find the area of triangle

Area = bh/2

 = (9 * 9.801)/2 = 44.104  cm²

STEP 1: Convert interest rate of 2% per 6 months into rate per year.

rate per year = rate per 6 month⋅2=2%⋅2=4%

STEP 2: Convert 9 months into years.

 9 months =

9

12

 years=0.75 years

STEP 3: Find principal by using the formula

I=P⋅i⋅t

, where I is interest, P is total principal, i is rate of interest per year, and t is total time in years.

In this example I = $15, i = 4% and t = 0.75 years, so

I

P

P

P

=P⋅i⋅t

=

I

i⋅t

=

15

0.04⋅0.75

=500

Final answer:

To calculate the amount at 6% simple interest on Rs 1200 for 9 months, apply the simple interest formula. Convert time to years, calculate the interest, then add it to the principal to find the total amount due, which is Rs 1254.

Explanation:

To find the amount at 6% simple interest on Rs 1200 due in 9 months, you can use the simple interest formula:

Simple Interest =  Principal × Rate × Time

We have the Principal (P) as Rs 1200, the Rate (R) as 6% per annum (or 0.06 when expressed as a decimal), and the Time (T) as 9 months. The rate is given per annum but we have in months so, we need to convert the time to years. There are 12 months in a year, so 9 months is ⅓ or 0.75 years.

Now, let's calculate the simple interest (SI):

SI = 1200 × 0.06 × 0.75 = Rs 54

Total Amount = Principal + Simple Interest

Total Amount = 1200 + 54 = Rs 1254

Therefore, the total amount due at the end of 9 months would be Rs 1254.

Answer:

a. equivalent

b. not equivalent

c. equivalent

d. equivalent

Step-by-step explanation:

a. 3x +7x = (3+7)x = 10x . . . equivalent to 10x

__

b. 5x -10x = (5 -10)x = -5x . . . not equivalent to 5x

__

c. 4(1 +2x) -3x = 4·1 +4·2x -3x = 4 +(8 -3)x = 4 +5x = 5x +4 . . . equivalent to 5x +4

__

d. 5 -3(2 -4x) = 5 -3·2 -3(-4x) = 5 -6 +12x = -1 +12x . . . equivalent to -1 +12x

The center-radius form of the circle equation is in the format

(x – h)²+ (y – k)² = r²

with the center being at the point (h, k) and the radius being "r"

So, just plug in the (-5,3) and you get:

(x+5)²+(y-3)²=16

Convert the tax rate from a percent to a decimal number by moving the decimal point 2 places to the left.

8.8% = 0.088

Now multiply the price of the item by the tax rate:

63 x 0.088 = 5.544

Now round that to the nearest cent = $5.54

Answer:

$5.54

Step-by-step explanation:

The answer is -9

Answer:

The missing value is -9

Step-by-step explanation:

-9+6 is -3.

For this case we have that by definition of logarithmic properties that, the expression

[tex]log_ {b} (a) = c[/tex] is equivalent to:

[tex]b ^ c = a[/tex]

Then, we have the following expression:

[tex]log_ {7} () = - 3[/tex]

It can be equivalent to:

[tex]7 ^ {- 3} =[/tex]

Answer:

The correct option is option A

[tex]7 ^ {-3}[/tex]

Answer:

is the fourth one

Step-by-step explanation:

just replace x with the numbers given

and then work it out.

y=x-5

y=1-5=-4

y=2-5=-3

and so on

hope this helps

For this case we have a function of the form [tex]y = f (x)[/tex]where:

[tex]f (x) = x-5[/tex]

We must find the values of "y" when [tex]x = 1,2,3,4[/tex]

Then, keeping in mind that different signs are subtracted and the sign of the major is placed:

Answer:

Option D

Answer:

Step-by-step explanation:

[tex]V_p=4\\\\\text{Calculate the volume of a cube:}\\\\V_{c}=\left(\dfrac{1}{3}\right)^3=\dfrac{1}{27}\\\\\text{Calculate how many times the volume of the prism is greater}\\\text{than the volume of the cube:}\\\\\dfrac{V_p}{V_c}=\dfrac{4}{\frac{1}{27}}=4\cdot27=108[/tex]

80 minutes past the hour

Answer:

Step-by-step explanation:

Step 1: Additive inverse

Step 2: Additive identity

Step 3: Addition property of equality

22 is D

The sum of the measures of the interior angles of a triangle is 180˚. Example 3: In NMQ. ∆.

For this case, we have given an ABC triangle with internal angles α,β,γ. By definition, the sum of the internal angles must be 180 degrees.

That is to say:

α+β+γ=180

This can be demonstrated according to the fifth postulate of Euclid. From there we have to draw a parallel to one of the sides, by the vertex opposite him, the interior angles of the left side add two right angles.

Answer:

180 degrees

Answer:

The height of the cone is 97 in

Step-by-step explanation:

Equate the formulas for the volume of a cylinder and that of a cone:

Vol-Cyl              Vol-Cone

πr²h         =        (1/3)πr²h

Now cancel out items that are the same on both sides (π):

r²h             =         (1/3)r²h

Now substitute the given values for both solids:

(12 in)²(8 in)  =  (1/3)(6 in)²(h-cone)

                                 1152 in³

Then (h-cone) = --------------------  =  97 in

                                   12 in²

The height of the cone is 97 in

Answer:

96 in

Step-by-step explanation:

ANSWER

The correct answer is C

EXPLANATION

The given inequality is:

[tex]2x - 8 \: < \: 7[/tex]

Group the constant terms on the right hand side to get;

[tex]2x \: < \: 7 + 8[/tex]

Simplify the right hand side

[tex]2x \: < \: 15[/tex]

Divide both sides by 2

[tex]x \: < \: \frac{15}{2} [/tex]

{x|x<15/2}

The correct answer is C

Answer:

[tex]\large\boxed{\left\{x\ |\ x<\dfrac{15}{2}\right\}}[/tex]

Step-by-step explanation:

[tex]2x-8<7\qquad\text{add 8 to both sides}\\\\2x-8+8<7+8\\\\2x<15\qquad\text{divide both sides by 2}\\\\\dfrac{2x}{2}<\dfrac{15}{2}\\\\x<\dfrac{15}{2}[/tex]

Answer:

-4, -1, 3, 5, 6

Step-by-step explanation:

Answer:

-4, -1, 3, 5, 6

Step-by-step explanation:

The domain is always on the left side. That was the trick I learned to remember. When you plot the numbers you would have them lined as X,Y. X,Y is equal to Domain, Range. I hope this helps!

Answer:

The correct choice is A.

Step-by-step explanation:

The axis of symmetry of the function is given by

[tex]x=-\frac{b}{2a}[/tex]

If the axis of symmetry is -1 then the relation between the 'a' and 'b' value for all the function that has an axis of symmetry to be -1, is

[tex]b=2a[/tex]

A. [tex]y=4x^2-8x+1[/tex]

We can see that

[tex]-8\ne 2(4)[/tex]

hence this function does not have an AOS of x=-1

The correct choice is A.

B. [tex]y=x^2+2x-6[/tex]

[tex]2\ne 2(1)[/tex], hence this function has an axis of symmetry of x=-1.

C. [tex]y=3x^2+6x[/tex]

[tex]6=2(3)[/tex]

This also has AOS x=-1

D. [tex]y=-x^2-2x+3[/tex]

[tex]-2=2(-1)[/tex]

AOS is x=-1

Answer:

7x2-1 = 0

Step-by-step explanation:

Add  1  to both sides of the equation :

                     7x2 = 1

Divide both sides of the equation by 7:

                    x2 = 1/7 = 0.143

When two things are equal, their square roots are equal. Taking the square root of the two sides of the equation we get:  

                     x  =  ± √ 1/7  

Answer:

Step-by-step explanation:

Rewrite 7x^2 + 1 = 0 as 7x^2 = - 1, and then as x^2 = -1/7.

Taking the square root of both sides, and remembering that the square root of a negative number is imaginary, we get:

                        i√7

x = ±i(1/7) = ± ----------

                          7

Answer:

Frequency is the number of times that roll occurred.

Ex: 7 occurred 5 times...... 5 goes in the frequency column.

The most efficient way is the 1st option

because all you have to do is add -3y on both sides to isolate x

If you used any other variables, you would have to use division which are extra steps

Answer:

Hence, the correct option is A) The variable x in the first equation has a coefficient of one so there will be fewer steps to the solution.

Step-by-step explanation:

Consider the provided system of equation.

x - 3y = 1  and  7x + 2y = 7

Let first solve the second equation.

[tex]7x + 2y = 7[/tex]

Step 1:

Divide both the sides by 7.

[tex]x + \frac{2y}{7} = 1[/tex]

Step 2:

[tex]x = 1- \frac{2y}{7} [/tex]

It took 2 steps to isolate the the variable x.

Now again consider the system of equation.

But this time we will solve the first equation.

[tex]x - 3y = 1[/tex]

Step 1:

[tex]x = 1 + 3y[/tex]

it took only 1 step to isolate the variable as the variable x in the first equation has a coefficient of one.

Hence, the correct option is A) The variable x in the first equation has a coefficient of one so there will be fewer steps to the solution.

Answer:

39

Step-by-step explanation:

11+11+6+6+5=39

ANSWER

44 inches

EXPLANATION

The perimeter is the distance around the figure.

The unknown vertical height of the shape is 11-6=5 in.

The unknown horizontal width of the shape is 11-6=5 in.

Adding all the distance gives the perimeter.

The perimeter is

[tex]11 + 6 + 5 + 5 + 6 + 11 = 44in.[/tex]

Therefore the perimeter of the shape is 44 inches.

Answer:

Mitch bought 5 buckets of wings

Step-by-step explanation:

y=# of wings

X= # of pizza

X+Y=13

X = 13 - Y

11.75X + 19.95Y = 193.75

11.75(13 - Y) + 19.95Y = 193.75

152.75 - 11.75Y + 19.95Y = 193.75

152.75 + 8.2Y = 193.75

8.2Y = 41

Y = 5

Mitch bought 5 buckets of wings

Mitch bought 5 buckets of wings for his Super Bowl party, which was determined by solving a system of equations using the given information about the total number of items purchased and the total cost.

To determine how many buckets of wings Mitch bought for his Super Bowl party, let's define a system of equations based on the information given:

Let's say p represents the number of pizzas, and w represents the number of buckets of wings. We are told that Mitch bought a total of 13 items, which gives us the equation:
p + w = 13.

We are also told that he spent a total of $193.75, with pizzas costing $11.75 each and buckets of wings costing $19.95 each. This gives us the second equation:
11.75p + 19.95w = 193.75.

To solve the system of equations, we can use substitution or elimination. One way is to solve the first equation for p (p = 13 - w) and substitute that into the second equation, leading to:
11.75(13 - w) + 19.95w = 193.75.

Simplifying the equation will allow us to find the value for w. The simplified equation is:
152.75 + 8.2w = 193.75

Subtracting 152.75 from both sides gives us
8.2w = 41,
and dividing both sides by 8.2 yields
w = 5.

Therefore, Mitch bought 5 buckets of wings for the party.

The side length of the triangle are as follows:

a = 11.71 and b = 15.56

The side of a triangle can be found using sine rule or cosine rule depending on the sides and angles given in a triangle.

Therefore, the sides a and b can be found in the triangle using sine rule as follows:

a / sin A = b / sin B = c / sin C

b / sin 110 = 7 / sin 25°

cross multiply

b sin 25 = 7 sin 110°

b = 7 sin 110° / sin 25

b = 6.5778483455 / 0.42261826174

b = 15.5625174507

b = 15.56 units

Let's find a as follows:

a / sin 45 = 7 / sin 25

a sin 25 = 7 sin 45

a = 7 sin 45 / sin 25

a = 4.94974746831 / 0.42261826174

a = 11.7108376716

a = 11.71 units

learn more on triangle here:https://brainly.com/question/17122223

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Answer:

There are 20 football players