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Bess [88]
2 years ago
8

A Plumber fixed a leaky sink and charge $60 for parts and $50 per hour for labor. The total bill was $285. Write down an equatio

n that can be used to find how many hours (h) the plumber spent fixing the sink.
Mathematics
1 answer:
riadik2000 [5.3K]2 years ago
5 0

Answer:

285 = 50h + 60; 4.5 hours

Step-by-step explanation:

$50 per hour - 50h

$60 for parts - 60

$285 total

285 = 50h + 60

225 = 50h

h = 4.5

The plumber worked for 4.5 hours to fix the leaky sink

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Solve the system of equations. 8x – 3y = 1 –2x + 3y = 11 A. (–1, –3) B. (–1, 3) C. (2, 5) D. (5, 2)
Makovka662 [10]

Answer:

C. (2, 5)

Step-by-step explanation:

Looking at the answer choices, you can see that solving for y will tell you which choice is correct. We can eliminate x from the equations by adding 4 times the second equation to the first:

(8x -3y) +4(-2x +3y) = (1) +4(11) . . . . . adding the equations to eliminate x

9y = 45 . . . simplified; next we divide by 9

y = 5 . . . . . matches choice C

_____

Check

8(2) -3(5) = 16 -15 = 1

-2(2) +3(5) = -4 +15 = 11 . . . . the answer checks OK in both equations

4 0
3 years ago
Gabrielle is 3 times older than mikhail. the sum of their ages is 80. how old is mikhail
skelet666 [1.2K]
The sum of their ages equals 80.
Gabrielle is 3 times older than Mikhail

Two numbers that have a sum of 80, with one number being 3 times the other are:
Gabrielle’s age: 60
Mikhail’s age: 20

60 + 20 = 80
20 x 3 = 60


Mikhail is 20 years old.

4 0
2 years ago
Solve for X<br> Solve for X
sammy [17]
X = 9

Work:
5x-3+48+90=180 (sum)
-3+48+90=135
135+5x=180
subtract 135 from 135 and 180 and that gives you 45
5x=45
divide each side by 5
x=9
3 0
3 years ago
Read 2 more answers
-2/7х=-1/3, срочно(если что это дроби)
maria [59]
Exact form: x=7/6

Decimal form: x=1.16

Mixed number form: x=1 1/6

7 0
2 years ago
Write a number whose square is between 100 and 150.
storchak [24]

11^2=121
12^2=144
You can write either 11 or 12.
3 0
3 years ago
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