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3 years ago

In a class, 42 students, there are 8 more boys than girls write and solve a system of 3 equations

Mathematics

1 answer:

zhenek [66]3 years ago

8 0

Answer:

x = 17

Step-by-step explanation:

x + x + 8 = 42 because x = boys and x + 8 = girls

2x = 34 because 2x = 42 - 8

x = 17

i hope this helps! you don't need the 2x = 42 - 8 to be an equation ;)

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A crew of highway workers paved 1/2 mile in 1/4 hour. If they work at the same rate, how much will they pave in one hour?

mote1985 [20]

Step-by-step explanation:

The easiest approach is to realise that one hour is 3 times longer than

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of a mile, in 20 minutes, how much in 60 minutes?#

They will pave 3 times more.

of a mile

You could also use the 'unitary method' where you find out how much they pave in ONE minute (divide by

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Look at what happens:

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exactly the same maths.

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3 years ago

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How to rewrite expression 1.572x100 using exponential form

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Esta es la respuesta
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3 years ago

The elevation of driskill mountain Louisiana is 163 meters above sea level death Valley has an elevation of -86 meters right any

timama [110]

Answer:

$-86$

Step-by-step explanation:

We have been given that the elevation of driskill mountain Louisiana is 163 meters above sea level. The death Valley has an elevation of -86 meters.

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3 years ago

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En said the value of the expression 72-8^2 +6*3 is 50. What mistake did Ben make? Correct Ben’s mistake and give the value of th

posledela

Given:

$72-\frac{8}{2}+6\times3$

He does mistake in the order of giving preference.

We should give preference in the order, division, multiplication, addition, subtraction.

But, he gave the first preferrence to the subtraction.

72-8=64

Next, he used division

64/2=32

Next he adds 32 with 8.

So, he gets 50.

But the actual simplification is,

Simplifying we get,

$\begin{gathered} 72-\frac{8}{2}+6\times3=72-4+18 \\ =68+18 \\ =86 \end{gathered}$

Hence, the correct value of the expression is 86.

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1 year ago

A bike rental shop charges $8 per hour and $4 insurance. How many hours can I rent the bike for if I have $20.

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Answer :
Two Hours

Step By Step :
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3 years ago

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