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3 years ago

Fill in the blank 3(2+7a)=6+

Mathematics

1 answer:

Lilit [14]3 years ago

8 0

Answer:

$3(2+7a)=6+$

$6 + 21a = 6$

$21a + 6 = 6 + 21a$

answer is 21a

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Which is the best first step and explanation for solving this system of equations?

Volgvan

Answer:

x=-4/9, y=10/3. (-4/9, 10/3).

Step-by-step explanation:

3x+4y=12

3x=2y-8

--------------

2y-8+4y=12

6y-8=12

6y=12+8

6y=20

y=20/6

simplify,

y=10/3

3x=2(10/3)-8

3x=20/3-8

3x=20/3-24/3

3x=-4/3

x=(-4/3)/3

x=(-4/3)(1/3)=-4/9

x=-4/9, y=10/3. (-4/9, 10/3).

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3 years ago

jenell wants to invest $5800 in a savings account that pays 6.6% simple interest. how long will it take for this investment to d

solong [7]

30.35 years so 31 years

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3 years ago

PLEASE HELP WILL GET BRAINIEST

NeX [460]

You have a lot of questions here, I can help you with a few of them.

When you simplify the polynomials, you put together all of the terms that have the same degree. That means the variables have the same exponents. The number of terms are the items separated by plus and minus signs.

Here are the answers for the first three:

1) $8x^3+2x^2-3x+9
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2) $4w^2 + 14w + 17$

3) $-3x^3+9x^2 +3x$

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4 years ago

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At what point does the line given by the following equation cross the y-axis?

QveST [7]

Pretty sure the answer is D:

Because the equation is in the format y=mx+c (c being the y intercept), we know that the y intercept (or where the line will cross the y axis) will be -9.

B also says -9 but we have to be careful because it states that the x axis is -9 rather than the y axis.

Hope that helped you understand.

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3 years ago

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- Paul wants to figure out the fuel consumption of his new SUV in the city. He made

Vesnalui [34]

Answer:

a.15.1 L/100 km; b $72.75; c. $51.34

Step-by-step explanation:

(a) Fuel consumption

Fuel used = 75 L

Distance travelled = 6096 km - 5600 km = 496 km

$\text{Fuel consumption} = \dfrac{\text{75 L}}{\text{496 km}} \times \dfrac{\text{ 100 km}}{\text{100 km}} = \dfrac{\text{15.1 L}}{\text{100 km}}$