2 years ago

When seven is subtracted from half of a number, the result is negative three. Find the number

Mathematics

1 answer:

Harlamova29_29 [7]2 years ago

5 0

Answer:

Step-by-step explanation:

0.5x-7=3

add 7 to both sides

0.5x=4

multiply both sides by 2

x=8

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The age of a father is 2 less than 7 times the age of his son. In 3 years, the sum of their ages will be 52. If the son’s presen

fomenos

Hello,

Let's assume f the age of the father,
s the age of the son.

<span>The age of a father is 2 less than 7 times the age of his son ==> f=7s-2 (1)

</span>
<span>In 3 years, the sum of their ages will be 52 ==>(f+3)+(s+3)=52 (2)

(2)==>f+s+6=52
==>f+s=46 (3)
(3) and (1) ==>7s-2+s=46
==>8s=48
==>s=6
f=46-6=40

</span>

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Step-by-step explanation:

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2 years ago

Solve the equation by completing the square. Round to the nearest hundredth if necessary. x^2 + 2x = 17

earnstyle [38]

Answer:

Step-by-step explanation:

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