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Paraphin [41]
3 years ago
11

A number sentence is said to be true if both numerical expressions are

Mathematics
1 answer:
Igoryamba3 years ago
6 0
If both expressions are equivalent (that is when both evaluate to the same number)
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PLEASE HELP ITS TIMEDDDD
Margaret [11]

Answer:

I'm not 100% sure but if I had to pick one I would go with B.

Step-by-step explanation:

Let me know if I'm correct if you decide to pick mine

6 0
3 years ago
Solve this equation 5x-7=-12
cupoosta [38]

Answer:

5x - 7= -12

5x - 7+7 = -12+ 7

5x= -5

x= -1

Step-by-step explanation:

hope this helped

7 0
3 years ago
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56 bananas Is what percent of<br> 80 bananas?
Vlada [557]

Answer:

70%

Step-by-step explanation:

Branlist please!

5 0
3 years ago
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In a U. S . Poll 8 out of 12 citizens said they were happy with the job Obama is doing. If 126 people were surveyed...
Solnce55 [7]

8 out of 12 people were happy.

8/12 reduces to 2/3 of the people were happy.

Multiply the total people surveyed by 2/3:

126 x 2/3 = (126 x 2) /3 = 252/3 = 84

84 people were happy.

8 0
3 years ago
Write the equation of the parabola that has its x-intercepts at (1+<img src="https://tex.z-dn.net/?f=%5Csqrt%7B5%7D" id="TexForm
VladimirAG [237]

Answer:

y=2x^2-4x-8

Step-by-step explanation:

<u>Factored form of a parabola</u>

y=a(x-p)(x-q)

where:

  • p and q are the x-intercepts.
  • a is some constant.

Given x-intercepts:

  • (1+√5, 0)
  • (1-√5, 0)

Therefore:

\implies y=a(x-(1+\sqrt{5}))(x-(1-\sqrt{5}))

\implies y=a(x-1-\sqrt{5})(x-1+\sqrt{5})

To find a, substitute the given point (4, 8) into the equation and solve for a:

\implies a(4-1-\sqrt{5})(4-1+\sqrt{5})=8

\implies a(3-\sqrt{5})(3+\sqrt{5})=8

\implies4a=8

\implies a=2

Therefore, the equation of the parabola in factored form is:

\implies y=2(x-1-\sqrt{5})(x-1+\sqrt{5})

Expand so that the equation is in standard form:

\implies y=2(x^2-x+\sqrt{5}x-x+1-\sqrt{5}-\sqrt{5}x+\sqrt{5}-5)

\implies y=2(x^2-x-x+\sqrt{5}x-\sqrt{5}x+\sqrt{5}-\sqrt{5}+1-5)

\implies y=2(x^2-2x-4)

\implies y=2x^2-4x-8

6 0
1 year ago
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