2 years ago

8

Mathematics

1 answer:

FrozenT [24]2 years ago

5 0

Answer:

8x + 4y = - 40

We can divide both sides by 4

2x + y = - 10

3x + y = - 8

If wa substract first one from the other one we have :

2 = x

So y = - 10 - 4 = - 14

OA is correct

You might be interested in

Suppose f(x) = 1/4 over the range a ≤ x ≤ b, and suppose P(X > 4) = 1/2.

Anettt [7]

Answer:

a=2

b=6

Step-by-step explanation:

Assuming a uniform distribution and that a ≤ x ≤ b, if f(x) = 1/4, then:

$f(x) =\frac{1}{4}=\frac{1}{b-a}\\b-a = 4$

If P(X > 4) = 1/2, then:

$\frac{1}{2} = 1-(\frac{x-a}{b-a})=1-(\frac{4-a}{4})\\a-4+4 =\frac{1}{2}*4\\ a=2\\b=4+a\\b=6$

The values for a and b are, respectively, 2 and 6.

3 0

3 years ago

Pleasssseeeeee hhhhheeeelllpppp

Alex777 [14]

Answer:

what can I help you miss

5 0

2 years ago

Read 2 more answers

PLEASE ANSWER RIGHT PLEASE

alukav5142 [94]

Answer:

Step-by-step explanation:

(x2-x1)2 + (y2-y1)2

(5-0)2 + (-3-3)2

25+36= 61

square root of 61

5 0

2 years ago

Which ordered pairs are solutions to the inequality 4x+y>-6

Lilit [14]

Answer:

(-1.5, 0) and (0, -6)

Step-by-step explanation:

3 0

2 years ago

Read 2 more answers

It takes 2 1/3 hours to paint a wall. How long will it take to paint 7 walls at this rate?

boyakko [2]

Answer:

Hi! The correct answer is 49/2 as an improper fraction and 24 1/2 in mixed number form!

Step-by-step explanation:

<em><u>~If it takes 2 and 1/3 to paint 1 wall then that's the unit rate. Multiply the unit rate by the number of total walls and that's your answer~</u></em>

7 0

2 years ago