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KiRa [710]
3 years ago
13

We can measure. waves with instruments

Mathematics
1 answer:
lana [24]3 years ago
8 0

Answer:

Yes, we can measure waves with instruments. We can also use math.

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A home improvement company gives a 30% discount
Furkat [3]

Answer:

1. $700

2.$515

Step-by-step explanation:

BECAUSE IF YOU DISCOUNT IT BY 30% JUST SUBTRACT IT LIKE $1000-30%=700

$2,545-30%=515

<h3>THATS My ANSWER</h3>
4 0
3 years ago
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Jane’s score on her first text was 72%.On Her second test she received a score of 81%. What was her percent increase?
laila [671]
9%........... bc 72-81=9
6 0
3 years ago
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Which expression is equivalent to 25a + 5b - 13
Ainat [17]

5(5a+b)-13

You would have to distribute

5*5a=25a

5*b=5b

6 0
4 years ago
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-7 x (-9) = <br> Multiplying Negative Numbers.
Stella [2.4K]
63, when multiplying negatives with negatives it cancel each other out.
8 0
4 years ago
Kevin can mow the lawn in 1.5 hours. Together, Kevin and Eric can mow the lawn in 30 minutes. How long will it take Eric to mow
xeze [42]

Answer:

45

Step-by-step explanation:

These work problems are always done in terms of fractions ie if both (Kevin & Eric) took 30mins to mow and Kevin took 1.5hrs (90mins) alone then we can make an equation like below

1/time took for both = 1/time took for Kevin + 1/time took for Eric

1/30 = 1/90+1/x    ==> calling time took for Kevin x

solving the above 1/x = 1/30-1/90

1/x=2/90

x=45

6 0
3 years ago
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