PLEASE HELP!!! I WILL GIVE 99 POINTS!!!!

1 answer:

5 0

The best approach would be B. make a table. It is the only of the answers that is correct and gives a clear strategy to find the answer. C...? Guessing is never good in math as a rule... and A... well this one is just wrong. You wouldn't be dividing the total by 7, you would be multiplying.

B is your correct answer.

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Which expression has an equivalent value to x2 + 9x + 8 for all values of x?

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Gekata [30.6K]

Answer:

Step-by-step explanation:

The expressions are not the same because different terms are negative. We can visualize the difference by rewriting the expressions as 13t + (-2t) and (-13t) + 2t. In the first expression, 13t-2t, the 2t is negative because it is being subtracted, and subtracting a number is the same as adding a negative.

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can someone please solve this? I clicked on homework help and it wasn't much help. I'm trying to turn in as much missing assignm

MA_775_DIABLO [31]

Answer:

One proportion to solve is 8/18 = x/8
Exact answer as a fraction: x = 32/9
Approximate answer in decimal form: x = 3.556

In reality, the 5's go on forever, but we have to round off somewhere.

========================================================

Explanation:

Break up the triangles as your teacher recommends. See the diagram below as to what I mean.

The smaller triangle has A = 8 as the horizontal side, and B = x as the vertical side

The larger triangle has C = 10+8 = 18 as the horizontal aside, and D = 8 as the vertical side.

We can form the proportion A/C = B/D.

A/C connects the horizontal sides (small/large) while B/D has the vertical sides tied together. The order of division is the same small over large. You could do large over small, but make sure you keep both sides consistent.

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Let's solve for x

A/C = B/D

8/18 = x/8

8*8 = 18*x .... cross multiply

64 = 18x

18x = 64

x = 64/18 .... divide both sides by 18

x = 32/9 exactly in fraction form

x = 3.556 approximately in decimal form

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Another proportion you can solve is A/B = C/D and you should get the same x value. It's the same as A/C = B/D because the B and C swap places. There are many other approaches you could take using different proportions.