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Kobotan [32]
3 years ago
15

85/100 = x/80. What is the unknown quantity?

Mathematics
2 answers:
Natasha2012 [34]3 years ago
7 0

85 x 80 = 6800

6800/100 = 68

x = 68

love history [14]3 years ago
6 0
Cross multiply then flip equation
85 * 80 and x * 100
6800 = 100x 
100x = 6800

Now divide each side by 100
100x ÷ 100 = 6800 ÷ 100
x = 68
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7x/z=10-r<br><br> solve for x
baherus [9]
Answer is:

x= 10z/7 - rz/7

4 0
2 years ago
Evaluate 0.1m + 8 - 12n when = 30 and n = 1/4<br><br> ​
Nastasia [14]

Answer:m=250

Step-by-step explanation:

0.1m+8-3=30

0.1m+5=30

0.1m=25

0.1 times 250=25

m=250

6 0
3 years ago
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What is the surface area of the prism? A. 180 in2 B. 204 in2 C. 120 in2 D. 192 in2
alukav5142 [94]
Asking the Math Gods...

B. 204in^2

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8 0
2 years ago
Tom and his best friend are going to join a gym. Tom saw that Platinum gym has a sale with a one time fee of $90 and a monthly f
worty [1.4K]

Answer:

<u>Part 1:</u>

For Platinum Gym:

90 + 30x

For Super Fit Gym:

200 + 20x

<u>Part 2:</u>  $270

<u>Part 3:</u>  $320

<u>Part 4:</u>  11 months

<u>Part 5:</u>  See explanation below

Step-by-step explanation:

<u>Part 1:</u>

Let "x" be the number of months:

For Platinum Gym:

90 + 30x

For Super Fit Gym:

200 + 20x

<u>Part 2:</u>

We put x = 6 in platinum gym's equation and get our answer.

90 + 30x

90 + 30(6)

90 + 180

=$270

<u>Part 3:</u>

We put x = 6 into super fit's equation and get our answer.

200 + 20x

200 + 20(6)

200 + 120

=$320

<u>Part 4:</u>

To find the number of months for both gyms to cost same, we need to equate both equations and solve for x:

90 + 30x = 200 + 20x

10x = 110

x = 11

So 11 months

<u>Part 5:</u>

We know for 11 months, they will cost same. Let's check for 10 months and 12 months.

In 10 months:

Platinum = 90 + 30(10) = 390

Super Fit = 200 + 20(10) = 400

In 12 months:

Platinum = 90 + 30(12) = 450

Super Fit = 200 + 20(12) = 440

Thus, we can see that Platinum Gym is a better deal if you want to get membership for months less than 11 and Super Fit is a better deal if you want to get membership for months greater than 11.

4 0
3 years ago
How to solve c/-9+6=14
neonofarm [45]

Answer:

-72

Step-by-step explanation:

step1:  c/-9=8

step2:  c= -72

7 0
3 years ago
Read 2 more answers
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