2 years ago

If you can't see it the question is use benchmarks to estimate decimals:

Mathematics

2 answers:

adoni [48]2 years ago

8 0

So do you want me to estimate with benchmarks or figur the whole thing

Svetllana [295]2 years ago

6 0

10.29 is the answer if you were asking that

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Help me out please, im only typing this much because its making me...

Genrish500 [490]

Answer:

B. $x^{2} +2x-8$

Step-by-step explanation:

Here the best method to solve is by substituting the end values of the set in each option , otherwise it will a time consuming problem.

Now substitute x=-4 in all the options

A. $x^{2} -2x-8$

16+8-8=16>0

so out of option A and C option C is correct.

B. $x^{2} +2x-8$

16-8-8=0 which means for the values of x>-4 $x^{2} +2x-8$ is less than 0

Now substitute x=2 in all the options

A. $x^{2} -2x-8$

4-4-8=-8<0 . so option A and C both are incorrect.

B. $x^{2} +2x-8$

4+4-8=0 which means for the values of x<2 $x^{2} +2x-8$ is less than 0

Therefore the correct option is B

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3 years ago

A rectangle has a length of 5x - 15 and a length of 2x + 7. What is the area of the rectangle?

Sergeu [11.5K]

2(5x-15) + 2(2x+7) =0
10x-30+4x+14 = 0
14x = 16
x = 8/7

3 0

2 years ago

Slove -4(x+1)-3=(x-4)

Nastasia [14]

Answer:

$x=-\frac{3}{5}$

Step-by-step explanation:

$-4(x+1)-3=(x-4) \\ \\ -4x-4-3=x-4 \\ \\ -4x-7=x-4 \\ \\ -7=5x-4 \\ \\ 5x=-3 \\ \\ x=-\frac{3}{5}$

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2 years ago

Read 2 more answers

HELP i need help quickly please

guajiro [1.7K]

Answer:

Step-by-step explanation:

3 0

2 years ago

I need help please.

alukav5142 [94]

Answer:

The answer is no because x would actually equal 59.9

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2 years ago