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tatiyna
2 years ago
12

"The square root of two times a number subtract five is equal to ten."

Mathematics
1 answer:
MrRa [10]2 years ago
8 0

I think this is √2n-5 = 10.

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120% of what number is 48
postnew [5]

Answer:

40

120 percent (calculated percentage %) of what number equals 48? Answer: 40.

8 0
3 years ago
The expression πr² is used to determine the area of a circle, where r is the length of the radius. What does the expression π(5b
Monica [59]
The answer is c because all you are doing here is subbing the variable r for 5b.
8 0
3 years ago
if $38 is invested at a simple interest rate of 2% per year, what would the total account balance be after forty years?
Debora [2.8K]

The answer is$30.40

I=P×R×T

I=38×.02×40

I=30.40

6 0
3 years ago
2. Sam has two part-time jobs, delivering pizza and mowing lawns. He makes $9/hr delivering pizza and $7/hr mowing lawns. Last w
frutty [35]

Answer:

<h2>22 hours and 10 hours </h2>

Step-by-step explanation:

let the jobs be x and y, so that

x+y=32--------1

9x+7y=248----2

x=32-y

substitute x=32-y for x in equation 2 we have

9(32-y)+7y=248

open bracket we have

288-9y+7y=248

-2y=248-288

-2y=-40

2y=40

divide both sides by 2 we have

y=40/2

y= 10 hours

subtitute y=10 for y in equation 1 to find x

x+10=32--------1

x=32-10

x=22

x=22 hours

4 0
3 years ago
A new health drink has 130% of the recommended daily allowance (RDA) for a certain vitamin . The rad for this vitamin is 45 mg.
Maslowich

Answer:

58.5 mg

Step-by-step explanation:

Drink: 130% of RDA of vitamin X

RDA vitamin X = 45mg

130% of 45 = mg in the drink

130% = 130/100 = 1.3

130% of 45 = 1.3*45 = 58.5

So, this new drink has 58.5 mg of vitamin

7 0
3 years ago
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