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valentinak56 [21]
3 years ago
9

4. María charges $15 for 3 h of babysitting. a) What is Maria's rate per hour?

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

Answer:

$5 per hour

Step-by-step explanation:

Take the amount she earns and divide by the number of hours

$15 / 3 hours

$5 per hour

aev [14]3 years ago
5 0
15/3 is 5 dollar an hour
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Sammy scored an 82% on his first test of the 9 weeks. Will a score of 38 out of 50 on the second test help or hurt his grade. Wh
Tatiana [17]

Answer:

Hurt

Step-by-step explanation:

A 38/50 is equal to a 74/100

(74%) 74 is lower than his first score of 82 so it will hurt his grade and bring it down

7 0
2 years ago
R 3. The mean of 4 numbers is 8. Three of the numbers add up to 22. What is the last number?​
statuscvo [17]
<h2><em><u>Solution</u></em> : </h2>

let the last number be x

we know,

\boxed{mean =  \frac{sum \:  \: of \:  \: all \:  \: observations}{number \:  \: of \:  \: observations} }

So,

\hookrightarrow \: 8 =  \dfrac{22 + x}{4}

\hookrightarrow \: 8 \times 4 = 22 + x

\hookrightarrow \: 32 = 22 + x

\hookrightarrow \: x = 32 - 22

\hookrightarrow \: x = 10

therefore, the last number is 10.

7 0
2 years ago
If 420 = 120%, what would 100% equal?
Ira Lisetskai [31]

Answer:

350

Step-by-step explanation:

Introduction. Percent, p%

'Percent (%)' means 'out of one hundred':

p% = p 'out of one hundred',

p% is read p 'percent',

p% = p/100 = p ÷ 100

120% = 120/100 = 120 ÷ 100 = 1.2

100% = 100/100 = 100 ÷ 100 = 1

Percentage of 120% of what number = 420?

120% × ? = 420

? =

420 ÷ 120% =

420 ÷ (120 ÷ 100) =

(100 × 420) ÷ 120 =

42,000 ÷ 120 =

350

<h2>Proof</h2><h3>How do we check the result?</h3>

If 120% × 350 = 420 =>

Divide 420 by 350...

... And see if we get as a result: 120%

<h3>Note:</h3>

Multiply a number by the fraction 100/100,

... and its value doesn't change.

100/100 = 100 ÷ 100 = 1

n/100 = n%, any number.

<h2>Hope it is helpful....</h2>
8 0
3 years ago
a merchant is selling wind chimes from a booth at a flea market. he rents his space for $125 per day. the profit from each wind
Oksi-84 [34.3K]
Rents his place for $125 per day and his goal has to be in 5 days. Lets use 125 times 5 days then each chime sold is $12 and we need the number of chimes sold so we use "x" as our variable. Equation 125(5) + 12x = 3500. Hope this helps.
7 0
3 years ago
Hey !! Can someone please help me with this??
Katyanochek1 [597]

Answer:

8^2 and 4 x 4 x 4

Step-by-step explanation:

4 to the third power, is the same as 4 x 4 x 4.

This is then equal to 64.

8 squared is also equal to 64, making it also an answer.

None of the other ones work.

<em>Hope this helps and have a nice day!! :) :] :D</em>

7 0
2 years ago
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