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madreJ [45]
3 years ago
13

Five years ago, John's age was half of the age he will be in 8 years. How old is he now?

Mathematics
2 answers:
notka56 [123]3 years ago
8 0
J-5=0.5J+8
J=0.5J+13
0.5J=13
J=26
Nostrana [21]3 years ago
7 0

The answer would be John is 18 years old

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The measure of the supplement of an angle is three times the measure of the
gtnhenbr [62]
<h2>Answer:</h2>

<h3><em>x=45degrees</em></h3>

<h2>Step-by-step explanation:</h2>

Let the angle to be solved be x

Let the supplement/compliment by y

x+y=90 Complimentary angles add up to 90 degrees.

x+3y=180 Supplementary angles add up to 180 degrees, the other angle is thrice the other compliment.

Evaluating this as a system:

x+y=90 Isolate x:

x=90−y Input into the other equation:

(90−y)+3y=180 Combine like terms, isolate y and its coefficients:

2y=90 Isolate y

y=45 Input into the first equation:

x+45=90 Isolate x:

x=45degrees

5 0
3 years ago
I need help with this could some one help me understand
mixer [17]
<h2>4000 miles (6,437.38 kilometers)</h2>

Since 1 inch is 500 miles on the map, 8 inches would be 8 times more than 500 miles.

In this problem, we have to use <u>multiplication method</u> to solve the problem.

Multiply 500 miles × 8 inches. In simplified manner:

500 × 8

We get the answer:

500 × 8 = 4000

Final result:

<h3>4000 miles</h3>

<em>Hope this helps :)</em>

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Answer:

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3 0
3 years ago
What number is 45% of 5/9
igor_vitrenko [27]
The right answer is 1/4
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blondinia [14]

Answer:

The answer is (-8,8)

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