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3 years ago

I don’t get this at all help.?

Mathematics

1 answer:

Karolina [17]3 years ago

4 0

Answer:

Step-by-step explanation:

a) Volume of prism: 6 units x 4 units x 7 units = 168 cubic units

b) Area of shaded base: 4 units x 7 units = 28 square units

Volume of prism: 6 x 4 x 7

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Breann solved the system of equations below. What mistake did she make in her work? 2x + y = 5 x − 2y = 10 y = 5 − 2x x − 2(5 −

goldfiish [28.3K]

Answer:

No mistake

Step-by-step explanation:

2x + y = 5

x - 2y = 10

y = 5 - 2x

x - 2(5 - 2x) = 10

x - 10 + 4x = 10

5x - 10 = 10

5x = 20

x = 4

2(4) + y = 5

y = -3

She made no mistake

You can check by plugging in x = 4 and y = -3 into the original equations . They fit exactly.

5 0

3 years ago

Find the values of x when y=1

kirill [66]

Answer:

$x=1+\sqrt{5}, 1-\sqrt{5}$

Step-by-step explanation:

$x^{2} -2x-4=0$
$(x-1)^{2} -1-4=0$
$(x-1)^{2} -5=0$
$(x-1)^{2} =5$
$x-1=\sqrt{5} ,-\sqrt{5}$
$x=1+\sqrt{5} , 1-\sqrt{5}$

FINAL ANSWER

$x=1+\sqrt{5} , 1-\sqrt{5}$

In Decimal Form (Rounded to 3 significant figures)

x≈-1.24, 3.24

6 0

3 years ago

Read 2 more answers

A line has a slope of 7 and contains the point (5, −9).

sergejj [24]

Your answer would come out to be y=7x-44
Which would be A, B, and D.
Those match up to that answer.

7 0

3 years ago

7. Simplify the answer to the equation. 3k + 4 + 2k +5

nignag [31]

Answer:

5k + 9

Step-by-step explanation:

3k + 4 + 2k + 5 =

= 5k + 9

4 0

2 years ago

Read 2 more answers

-12.166 divided by (-1.54)

Sloan [31]

Step-by-step explanation:

=-12.166/-1.54 [if - is in both numerator and denominator then they are cancled out]

=12.166/1.54

=7.9

4 0

3 years ago