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Sidana [21]
3 years ago
5

What is x2+2x-8=0 by factoring ?

Mathematics
1 answer:
Vaselesa [24]3 years ago
7 0

Answer:

(x+4)(x-2)

Step-by-step explanation:

We need to find two numbers that multiply to -8 and add up to 2. These are 4,-2.

Rewrite the polynomial:

x^2-2x+4x-8

and factor each pair:

x(x-2)+4(x-2) = (x+4)(x-2)

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What percent of 30 is 33
Llana [10]
Hi!

To solve this we can set up a proportion and cross multiply.

\frac{33}{30}  \frac{x}{100}

33 x 100 = 3300
3300/30 = 110

The answer is 110%

Hope this helps! :)
3 0
3 years ago
How to find the missing side of a triangle
Akimi4 [234]

Answer:

All sides of a triangle should equal 180 degrees, so just add up the given sides and subtract them from 180

Step-by-step explanation:

3 0
3 years ago
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The average of your first 6 tests is 82. If your test average after your seventh test is an 80.5, what did you score on the seve
mart [117]
So average is  of the first 6 tests is 82   well that means 

(test1 + test2+ test3+ test4 + test5+test6)/6 = 82

so now let do some cross multiplliying 

test1 + test2 + test3 + test 4 + test5 +test6 = 82*6

test1 + test2 + test3 + test 4 + test5 +test6  = 492

now lets see if we can find that 7th test score

(test1 + test2 + test3 + test4 + test5 +test6 + test7)/7 = 80.5

So look we found test1 + test2 + test3 + test4 + test5 +test6 to be 492 so lets substitute. 

(492 + test7 )/7 = 80.5

test7 = (80.5*7)-492 = 71.5 



7 0
3 years ago
All of the following have the same value except _____.
Semenov [28]

Answer:

Daily points, you have made my day!!!!!!!!!!!!!!!!!!!!!!!!!!!

Step-by-step explanation:

7 0
3 years ago
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There is a drought and the oak tree population is decreasing at the rate of 5% per year. If the population continues to decrease
amid [387]
In approximately 10 years the oak tree population will be 50% of what it is.  because 5 x 10 = 50. hope this helps :)

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