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sertanlavr [38]
3 years ago
13

Evaluate 5(x-1)-2 when x=3 A. 12 B. 8 C. 0 D. -4

Mathematics
1 answer:
Irina-Kira [14]3 years ago
7 0

Answer:

8 because 5(3-1)-2= 10-2 which makes 8

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Yumi and Juan pick up litter along the highway at the same rate. Yumi picks up litter for 3 miles and takes two hours longer tha
Harlamova29_29 [7]

3/(x+2) = 2/x

multiply both fractions by x(x+2) to cancel out the bottoms

so it becomes 3x = 2x+4

ow subtract 2X from both sides and you get

x = 4

so it took Juan 4 hours

 it took Yumi 2 hours more so 4+2 = 6 hours

7 0
3 years ago
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Which expression have a value -7
vlabodo [156]

x+7=0

x=-7

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3 0
3 years ago
Answer please! I have been "getting" the correct answer, as far as I know. The answer which I got was 10x^2 - 4x. But I don't se
GarryVolchara [31]

Answer:

The answer is 10x² - 4x.

Step-by-step explanation:

You have to apply Distributive Law,

a(m + n) = am + an

So for this question :

2x(5x - 2)

= 2x(5x) + 2x( - 2)

= 10 {x}^{2}  - 4x

4 0
4 years ago
A hotel has a pool in the shape of a rectangle. The pool is 8 m long, 3 m wide, and 2,000 cm deep. What is the volume of the poo
Maslowich
Ok, first you need to change the 2,000 cm into meters and then you just multiply all the sides.
4 0
4 years ago
A group of 2 adults and 4 children spent $38 on tickets to a museum. A group of 3 adults and 3 children spent $40.50 on tickets
mrs_skeptik [129]

Answer:

adult $8.00

child $5.50

Step-by-step explanation:

Let the price of 1 adult ticket = x.

Let the price of 1 child ticket = y.

2x + 4y = 38

3x + 3y = 40.5

Multiply the first equation by 3. Multiply the second equation by -2. Then add them.

         6x + 12y = 114

(+)      -6x - 6y = -81

-----------------------------

                  6y = 33

y = 33/6

y = 5.5

2x + 4y = 38

2x + 4(5.5) = 38

2x + 22 = 38

2x = 16

x = 8

Answer:

adult $8.00

child $5.50

4 0
3 years ago
Read 2 more answers
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