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ivolga24 [154]
2 years ago
9

Please help me ASAP!

Mathematics
2 answers:
spin [16.1K]2 years ago
7 0

Answer:

10

Step-by-step explanation:

2x+46+3x-6 = 90

5x + 40 = 90

5x = 50

x =10

melamori03 [73]2 years ago
4 0
The answer is 10 I think I’m right
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Quadratic Equation
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Step-by-step explanation:

The sum of ages of two friends is 13 years.

The product of their ages is 42.

<em>Let the age of 1st friend and 2nd friend is x, y respectively.</em>

<em>1 st condition= The sum of ages of two friends is 13 y</em><em>r</em><em>s. </em>

i.e x+y = 13........ (I)

<em>2nd condition= The product of their ages is 42.</em>

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y(y - 7) - 6(y - 7) = 0

(y - 6) (y - 7) = 0

Either; y-6 = 0

y = 6

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y-7=0

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Therefore, the value of X is 6.

Therefore, either 1st friend is 6 years and 2nd is 7 years.

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Answer:

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y = 2x - 8

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