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Evgen [1.6K]
3 years ago
8

Kelly and Max run a race. Max takes 42 seconds to run the race. She is 7 seconds faster then Kelly. How many seconds does Kelly

take? please show the work if possible
Mathematics
2 answers:
Margaret [11]3 years ago
7 0

Answer

49 seconds for Kelly

Step-by-step explanation:

Max ran 42 and he was FASTER by 7 seconds which means Kelly will have a greater number so you will then add the missing seven seconds to Kelly's time which equals 49

yan [13]3 years ago
4 0

Answer:

35 seconds

Step-by-step explanation:

if you simply minus 7 seconds from max 42 second time you get 35 seconds.

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A rectangular billboard is 30 feet by 18 feet. If a gallon of paint covers 250 square feet, how many gallons should be purchased
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Answer:

C. 3 gallons

Step-by-step explanation:

30 ft × 18 ft = 540 ft²

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2.16 is not an option so you would have to buy 3 gallons and only use 2.16 gallons.

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Find the circumference of c round to the nearest hundredth
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Step-by-step explanation:

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2 years ago
Find the area of the figure.
Contact [7]

area of rectangle= 8*13=104m^2

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7 0
3 years ago
Given that QT is an altitude of triangle QRS, measure of angle QTS=(6x+36), and QR = 2x – 5, find QR.
Alexeev081 [22]
We know that
if <span>QT is an altitude of triangle QRS
then
</span><span>the measure of angle QTS is equal to 90</span>°
so
6x+36=90-----> 6x=90-36----> x=54/6
x=9
QR=2x-5-----> QR=2*9-5-----> QR=18-5-----> QR=13

the answer is
QR=13
6 0
3 years ago
Read 2 more answers
A study has indicated that the sample size necessary to estimate the average electricity use by residential customers of a large
Zanzabum

Answer:

\sigma=547.1125

Step-by-step explanation:

-The margin of error is calculated using the formula:

ME=z_{\alpha/2}\times \frac{\sigma}{\sqrt{n}}\\\\

-We substitute the values, n=900 and ME=30 in the formula to solve for standard deviation:

ME=z_{\alpha/2}\times \frac{\sigma}{\sqrt{n}}\\\\\\30=1.645\times\frac{\sigma}{\sqrt{900}}\\\\\sigma=\frac{30^2}{1.645}\\\\=547.1125

Hence, the population standard deviation is 547.1125

7 0
3 years ago
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