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astra-53 [7]
3 years ago
13

Look at the student work shown below.

Mathematics
2 answers:
Marrrta [24]3 years ago
6 0

Answer:

,bnc

Step-by-step explanation:

cluponka [151]3 years ago
4 0
Alrighty, so you said, simplify: 4t (2s - 7)

When there is a variable or number outside of the parenthesis, it means that it wants the whole thing multiplied by that number.

So, your right way to do this is:

4t (2s) + 4t (-7)

Simplify.

8st - 28t

So, the student incorrectly simplified them because she didn't multiply -7 by 4t like they should have.

~Hope I helped!~
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What number is 35% of 600
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The ratio of boys to girls in a group is 7:1. If there are 66 more boys than girls, work out how many girls there are
nevsk [136]

Answer:11

Step-by-step explanation:

Boys : girls=7:1

Sum of ratio=7+1=8

Let them number of girls be y

Then they number of boys=y+66

Total number of pupils=y+y+66

Total number of pupils=2y+66

Number of girls=(girls ratio)/(sum of ratio) x (total number of pupils)

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Cross multiply

y x 8=2y + 66

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Collect like terms

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Divide both sides by 6

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4 0
3 years ago
James practiced Piano for 48 Minutes. Alisa practiced 5 times long as James. How many Minutes did Alisa Practice? how many minut
ANEK [815]

Answer:

Alisa practiced for 240 minutes (4 hours). In total, they practiced for 288 minutes (4.8 hours).

Step-by-step explanation:

If James practiced for 48, and Alisa practiced 5 times as long, then we would multiply 48 by 5 (240 minutes).

If we want to find how many minutes in total they practiced, then we would add 240 minutes (Alisa's practice time) and 48 minutes (James' practice time) together, which would equal 288 minutes (4.8 hours).

Equation: y=48+x

3 0
3 years ago
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