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yuradex [85]
3 years ago
7

-NEED AN ANSWER FAST-

Mathematics
1 answer:
Zinaida [17]3 years ago
5 0
$25.75 is how much money she saved up each week
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2x+2(3x+5)=91 what is the answer
goldenfox [79]

Answer:

if the answer is the value of x then it would be 13.5

Step-by-step explanation:

8 0
3 years ago
Read 2 more answers
A survey found that 3 out of 100 randomly selected people have red hair. How many people in a group of 12,000 randomly selected
kirza4 [7]

Answer:

360 people out of 1200 are likely to have red hair.

Step-by-step explanation:

So I just saw that 100 x 120 equals 1200. So I just need to multiply 3 x 120 and I got 360. I think this is how to solve?

4 0
2 years ago
HELP ASAP ...........
dedylja [7]

Answer:

A

Step-by-step explanation:

Given

y - 2x - 8 = 0 ( add 2x + 8 to both sides )

y = 2x + 8 → (1)

y² + 8x = 0 → (2)

Substitute y = 2x + 8 into (2)

(2x + 8)² + 8x = 0 ← expand left side using FOIL and simplify

4x² + 32x + 64 + 8x = 0

4x² + 40x + 64 = 0 ( divide through by 4 )

x² + 10x + 16 = 0 ← in standard form

(x + 8)(x + 2) = 0 ← in factored form

x + 8 = 0 ⇒ x = - 8

x + 2 = 0 ⇒ x = - 2

Substitute these values into (1) for corresponding values of y

x = - 8 : y = 2(- 8) + 8 = - 16 + 8 = - 8 ⇒ P (- 8, - 8)

x = - 2 : y = 2(- 2) + 8 = - 4 + 8 = 4 ⇒ Q (- 2, 4 )

Calculate the length of PQ using the distance formula

PQ = \sqrt{(x_{2}-x_{1})^2+(y_{2}-y_{1})^2    }

with (x₁, y₁ ) = P (- 8, - 8) and (x₂, y₂ ) = Q (- 2, 4 )

PQ = \sqrt{(-2-(-8))^2+(4-(-8))^2}

      = \sqrt{(-2+8)^2+(4+8)^2}

       = \sqrt{6^2+12^2}

       = \sqrt{36+144}

       = \sqrt{180}

       = \sqrt{36(5)}

       = \sqrt{36} × \sqrt{5}

        = 6\sqrt{5} → A

8 0
2 years ago
-9x2 + 13x – 1=0<br><br> I need 3 answers, pls help me:)
kifflom [539]

The answer to this question is x = 13/9 = 1.444

5 0
3 years ago
Name the types of angles shown
monitta

Answer:

A

Step-by-step explanation:

3 0
3 years ago
Read 2 more answers
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