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Lelu [443]
3 years ago
7

ASAP:::::: 75 POINTS TO THE BRAINLIEST!!!!!

Mathematics
1 answer:
Misha Larkins [42]3 years ago
6 0

Answer:

t = 6 4/25 hours

Step-by-step explanation:

The formula to find out how long it takes them to do the job is

1/m  + 1/ a  = 1 /t

where m is the time for Matthew to do the job

a is the time for Arianna to do the job

and t is the time for them to do the job together

m = 14 hours

a = 11 hours

Substituting what we know

1/14 + 1/11 = 1/t

Multiplying by 154t (14*11*t) so we can clear the fractions

154t*(1/14 + 1/11) = 1/t* 154t

 11t + 14t = 154

Combine like terms

25t = 154

Divide by 25

t = 154/25

t = 6 4/25 hours


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Luis wants to buy a skateboard that usually sells for $79.74. All merchandise is discounted by 12%. What is the total cost of th
eduard

Answer:

75.26

Step-by-step explanation:

Most sales taxes work by not being calculated until cash in some form changes hands. So you take the discount first and then you add the sales tax on the new amount.

Take the discount first

Original cost = 79.74

Discount amount = 79.74 * 12% = 79.74 * 12/100 = 9.57

New price = 79.74 - 9.57 = 70.17

Now you are ready to add on the sales tax

70.17 * 7.25/100 = 5.09

The total is 70.17 + 5.09 = 75.26

7 0
2 years ago
The sale price of every item in a store is 75% of its usual price. A. The usual price of a jacket is $80, what is its sale price
riadik2000 [5.3K]

75 × 0.01 = 0.75

0.75 × 80 = $60

75 ×0.01 = 0.75

0.75 × 28 = $21

8 0
3 years ago
Find the value of x. Show all of your work!
Georgia [21]

Answer:

145⁰

Step-by-step explanation:

180 minus 73⁰ plus 62⁰

which is 180 minus 135

145⁰

7 0
3 years ago
Why is x = 4 a solution to the proportion StartFraction 14 over x EndFraction = StartFraction 56 over 16 EndFraction?
mamaluj [8]

Answer:

D <u><em>Because if you substitute 4 into the equation for x and cross multiply, you get 224 = 224.</em></u>

Step-by-step explanation:

When you cross multiply, you get 14×16=224, and 224÷4=56.

6 0
3 years ago
Read 2 more answers
30 POINTS FOR BRAINLIEST ANSWER!!!!!!!​
skad [1K]
I think b not sure it’s the only one that makes sense
6 0
3 years ago
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