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Harlamova29_29 [7]
3 years ago
8

Evaluate the expression x=7 18-1.8x=

Mathematics
1 answer:
ElenaW [278]3 years ago
5 0

18-1.8x= ?

x = 7

So, substitute the number in for the x

18-1.8*7

18-12.6=5.4

5.4 is your answer

-IronWolfX✔

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Use the Commutative Property on the expression 7x - 5.
Schach [20]

Answer:

<h2>-5 + 7x</h2>

Step-by-step explanation:

The Commutative Property states that the order of addition or multiplication does not matter.

EXAMPLE 1 : 1 + 2 = 2 + 1 = 3

EXAMPLE 2: 3 x 4 = 4 x 3 = 12

It appears that we cannot use the commutative property on this expression. But we can. First, we need to change - 5 = + -5.

7x - 5 = 7x + -5

Because we now have addition, we can prove the commutative property.

-5 + 7x = 7x + -5

I'm always happy to help :)

4 0
2 years ago
he value of y varies directly with the value of x. When y = 32.5, x = 5. What is the value of y when x = 10? A) 1.5 B) 2.2 C) 37
xz_007 [3.2K]

Answer:

D) 65

Step-by-step explanation:

The formula for direct variation is

y = kx

where k is the constant of variation.


If we know y=32.5 and x=5, we can substitute in to calculate k

32.5 = k * 5

Divide each side by 5

32.5/5 = k

6.5 = k

So the equation is

y = 6.5k

Given x =10

y = 6.5*10

y = 65

7 0
3 years ago
Read 2 more answers
Share 66 g of sugar in the ratio 2:3:1?​
slega [8]

Answer:

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Step-by-step explanation:

6 0
3 years ago
What equation has the solution x= 5+2 square root of 7 divided 3
Paraphin [41]
Put it in the calculator and the answer is 3.4305
7 0
3 years ago
Jack's house is located at the origin (0,0). He walks 2 blocks right. Then, he walks 6 blocks up. Finally, he walks 3 blocks rig
attashe74 [19]

Answer: 5, 6

Step-by-step explanation:

0 + 2 = 2

2 , 0

0 + 6 = 6

2, 6

2 + 3 = 5

5, 6

5 0
2 years ago
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