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Tanzania [10]
3 years ago
5

What makes the open sentence 7x - 7 = 2x + 8 true

Mathematics
2 answers:
lukranit [14]3 years ago
8 0

7x - 7 = 2x + 8

7x - 2x = 8 + 7

5x = 15

 x = 3

Answer

C. X = 3

taurus [48]3 years ago
4 0

If we plug x = 3 into the equation we have

7(3) - 7 = 14

and

2(3) + 8 = 14

So the answer is C

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What number must be added to the expression below to complete the<br> square?<br> х2 - 20х
DochEvi [55]

Answer:

100

Step-by-step explanation:

This is formula fot completing the square:

(b/2)^(2)

(-20/2)^(2)

100

6 0
2 years ago
Which property is used in the problem below?<br><br> 2(x+4)=2x+8
frutty [35]

Answer:

You would use the distributive property.

Step-by-step explanation:

2(x+4) = 2x+8

2x+8x = 2x+8

10x = 2x+8

10x - 2x = 2x-2x+8

8x = 8

8x/8 = 8/8

x = 1

7 0
2 years ago
Given that P = (-5, 5) and Q = (-13, 10), find the component form and magnitude of 2 vector PQ.
Brut [27]
Define unit vectors along the x-axis and the y-axis as \hat{i} , \, \hat{j} respectively.

Then the vector from P to Q is
\vec{PQ} = (-13+5)\hat{i} + (10-5)\hat{j} = -8\hat{i} + 5\hat{j}
In component form, the vector PQ is (-8,5).

The magnitude of vector PQ is
√[(-8)² + 5²] = √(89) = 9.434

Answer:
The vector PQ is (-8, 5) and its magnitude is √89  (or 9.434).
4 0
3 years ago
Read 2 more answers
Help plz I really need to pass
Tresset [83]

Answer:

2.56

Step-by-step explanation:

The equation they dive u: d = 16t^2, so in the question they said what's the distance, d, if t = 0.4

So you just have to replace t with 0.4:

d = 16t^2

d = 16(0.4)^2

d = 16(0.16)

d = 2.56

3 0
2 years ago
An items is regularly priced at $20. Keisha bought it on sale for 40% off the regular price. How much did Keisha pay?
nirvana33 [79]

Answer:

Kiesha paid $12.

Step-by-step explanation:

40% of 20 is 8. So you subtract 8 from 20 and that gives you the amount she paid.

6 0
2 years ago
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