3 years ago

Joe solved this linear system correctly.

1 answer:

7 0

There are infinitely many solutions because the first two equations are actually the same just arranged differently so there's not enough information to know what x or y are in other words they could be anything.

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If a student had homework 87 days out of 100 what fraction and what percentage of days did the student not have homework? Give 2

Vlad [161]

Well 87 of 100 is

87/100 = 87% = .87

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3 years ago

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2. (01.01) Evaluate 32+(5-2)-4- O 19 O 16 O 46 24 3 . (1 point)

PilotLPTM [1.2K]

32+(5-2)-4
=32+3-4
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=31

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2 years ago

David cast a shadow 42" long at the same place and time in Emma cast a shadow 28" long. David is 66" tall. What is Emma's height

Nikolay [14]

ANSWER

Emma is 44" tall

EXPLANATION

We have that David cast a shadow 42 inches long and he is 66 inches tall.

At that same place and time, Emma cast a shadow of 28 inches.

Since they are at the same spot and time, we can conclude that the ratio of their height to shadow must be the same.

Let Emma's height be x.

The ratio of David's shadow to height is:

42 : 66 or 42 / 66

For Emma, it is:

28 : x or 28 / x

That means that:

$\begin{gathered} \frac{42}{66}\text{ = }\frac{28}{x} \\ \text{Solve for x by cross-multiplying:} \\ 42\cdot\text{ x = 66 }\cdot\text{ 28} \\ x\text{ = }\frac{66\cdot\text{ 28}}{42} \\ x\text{ = 44 inches} \end{gathered}$

So, Emma is 44" tall.

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10 months ago

What is 124/87 SOMEONE?

Rufina [12.5K]

Answer:

1.53

Step-by-step explanation:

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3 years ago

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Gerald drives 200 miles in 2 1/2 hours. what is gerald's average speed?

Dimas [21]

Answer:

80mph

Step-by-step explanation:

200 divided by 2 1/2 is 80.

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3 years ago