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3 years ago

Solve the quadratic equation X^2+3x-70=0

Mathematics

2 answers:

matrenka [14]3 years ago

4 0

Answer:

X can either be 7, or -10. You can prove this by plugging in the numbers yourself :)

Step-by-step explanation:

Please mark as brainliest

monitta3 years ago

4 0

First you Factor out x from the expression. Then Factor out (x+10) from the expression. Seprate into possible cases (When the product of factors equals 0, at least one factor is 0). Then solve the equations for x. This equation has two solutions x1=-10 and x2=7

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Can y’all help me on question 22?!

Georgia [21]

Answer:

B. 4 7/8 x 5 x 12 1/2

Step-by-step explanation:

volume = L x H x W

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3 years ago

The sum of two numbers is 55 and the difference is 9. what are the numbers?

Mars2501 [29]

X + y= 55
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7 0

4 years ago

Read 2 more answers

Please help if you can

Arisa [49]

Answer:

Option D

Step-by-step explanation:

Formula to be used,

Scale factor = $\frac{\text{Dimension of the image rectangle}}{\text{Dimension of the original}}$

By this formula,

$\frac{7}{2}=\frac{\text{Length of the dilated rectangle}}{\text{Length of the original rectangle}}$

$\frac{7}{2}=\frac{L}{22}$

L = $\frac{7\times 22}{2}$

= 77 inches

Similarly, width of the the dilated rectangle = $\frac{7}{2}\times 10$

= 35 inches

Perimeter of the new rectangle = 2(Length + width)

= 2(77 + 35)

= 224 inches

Option (D) will be the correct option.

7 0

3 years ago

What is the solution to the proportion? 45/n=9/11 A.n=2.2 B.n=36.8 C.n=55 D.n=90

Ostrovityanka [42]

The answer is: [B]: " n = 36.8 " .
______________________________________________________
Explanation:
_________________________________________________________
45/n = 9/11 ;

11n = 9 * 45;

11n = 405;

11n / 11 = 405/11;

n = 36.8181818181818182 -----> answer choice: "B".
________________________________________________

8 0

4 years ago

The length of a rectangle is three times its width. if the area of the rectangle is 75 in2, find its perimeter.

UkoKoshka [18]

Answer:

40 in

Step-by-step explanation:

For a width of w, the length is 3w and the area and perimeter are ...

A = LW = (3w)(w) = 3w^2

P = 2(L+W) = 2(3w +w) = 8w

We are given the area, so we can find w to be ...

75 in^2 = 3w^2

25 in^2 = w^2 . . . . . divide by 3

5 in = w . . . . . . . . . square root

Then the perimeter is ...

P = 8w = 8(5 in) = 40 in

7 0

3 years ago