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Angelina_Jolie [31]

3 years ago

9

Help meee plz fast!!!!!!

2 answers:

Maurinko [17]3 years ago

5 0

Answer: i dont know if im right nbut the answer is 4

Step-by-step explanation:

Sergeu [11.5K]3 years ago

4 0

Answer:

9

Step-by-step explanation:

$A_1 = 7 * (x + 7)$

$A_2 = 8 * (x + 5)$

$A_1 = A_2$

$7(x + 7) = 8(x + 5)$

$7x + 49 = 8x + 40$

$x + 40 = 49$

$x = 9$

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A stone is thrown vertically upward from a platform that is 20 feet height at a rate of 160 ft/sec. Use the quadratic function h

Nutka1998 [239]

Check the picture below.

$\textit{vertex of a vertical parabola, using coefficients} \\\\ y=\stackrel{\stackrel{a}{\downarrow }}{-16}x^2\stackrel{\stackrel{b}{\downarrow }}{+160}x\stackrel{\stackrel{c}{\downarrow }}{+20} \qquad \qquad \left(-\cfrac{ b}{2 a}~~~~ ,~~~~ c-\cfrac{ b^2}{4 a}\right)$

$\left(-\cfrac{ 160}{2(-16)}~~~~ ,~~~~ 20-\cfrac{ (160)^2}{4(-16)}\right) \implies \left( - \cfrac{ 160 }{ -32 }~~,~~20 - \cfrac{ 25600 }{ -64 } \right) \\\\\\ \left( 5 ~~~~ ,~~~~ 20 +400 \right)\implies (\stackrel{seconds}{5}~~,~~\stackrel{feet}{420})$

6 0

2 years ago

A company has a manufacturing plant that is producing quality jackets. They find that in order to produce 150 jackets in a month

Masja [62]

Answer:

$y = 14x + 3400$

Step-by-step explanation:

Represent

- number of jackets with x

- costs of jackets with y

So, we have:

$(x_1,y_1) = (150,5500)$

$(x_2,y_2) = (370,8580)$

Required

Write an equation in form of y = mx + b

First, we need to determine the slope (m)

$m = \frac{y_2 - y_1}{x_2 - x_1}$

$m = \frac{8580 - 5500}{370 - 150}$

$m = \frac{3080}{220}$

$m = 14\\$

The equation is calculated using:

$y-y_1 = m(x - x_1)$

Where

$m = 14\\$

$(x_1,y_1) = (150,5500)$

So, we have:

$y - 5500 = 14(x - 150)$

$y - 5500 = 14x - 2100$

Make y the subject

$y = 14x - 2100 + 5500$

$y = 14x + 3400$

3 0

3 years ago

Sally had $26. Then she earned some more money doing chores.

stich3 [128]

Answer:

$9

Step-by-step explanation:

Sally started with $26 and ended with $35 meaning she earned money

If she began with a lower number than she started with, you have to subtract the greater number by the lower to find the difference

35-26 = 9

THEREFORE she made $9 doing chores

3 0

3 years ago

Read 2 more answers

How do you solve for factoring polynomials with leading coefficient >1

svetoff [14.1K]

Answer: (x+5)*(x+2)

Step-by-step explanation:

1: Write as a sum

x^2+7x+10

2: Factor the expressions

x^2+5x+2x+10

3: Factor the expression

x(x+5)+2(x+5)

Answer: (x+5)(x+2)

Hope this helps!

4 0

3 years ago

The window has a perimeter of 86 cm the width is 14 cm what is the length ofnthe window

kenny6666 [7]

Answer:

$\frac{86 - 28}{2} = \frac{58}{2} = 29$

3 0

3 years ago