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2 years ago

Distribute and simplify: 7(2x-4) + 2(3x+1)

Mathematics

1 answer:

SSSSS [86.1K]2 years ago

8 0

7(2x - 4) + 2(3x + 1) Distribute/multiply 7 into (2x - 4), and multiply 2 into (3x + 1)

14x - 28 + 6x + 2 Combine like terms

20x - 26

Your answer is B

$4y^{2} -\frac{2x}{7} +2y$

x = 7

y = 2

Plug in the numbers into the variables

$4(2)^{2} -\frac{2(7)}{7} +2(2)$

4(4) - 2 + 4

16 + 2

Your answer is D

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What is the equation of the line that passes through the point (−1,−3) and has a slope of 3?

Tanya [424]

Answer:

y= 3x

Step-by-step explanation:

The slope is just read. It is 3. It is the value of m in the general equation.

y = mx + b

y = 3x + b

To find b, use (-1,-3)

x = -1

y = -3 Substitute into the general equation

-3 = 3(-1) + b Simplify the right side

-3 = -3 + b Subtract -3 from both sides

b = 0

Answer: y = 3x

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2 years ago

True or false? Please help.

maks197457 [2]

Answer:

True

Step-by-step explanation:

Vertical angles are angles that essentially opposite of eachother. Vertical angles are a pair of opposite angles formed by intersecting lines.

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2 years ago

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Find the length of segment AC if AB is 7, BC is 12 and B is between a A and C

Bess [88]

Step-by-step explanation:

If the B is the middle of the segment AC,

AC= AB+BC

AC=7+12= 19.

If I'm wrong, correct me please. I would be pleased.

4 0

2 years ago

Michelle ran 2,827 meters at a constant speed over 11 minutes. What was Michelle's pace?

jok3333 [9.3K]

257 meters per minute

5 0

2 years ago

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Nhan and Phuong both left town A for town B at 5 am . After 5 hours , Nhan and Phuong were 102 km and 52 km away from town B res

Pepsi [2]

Answer:

Nhan reach town B at 13:24 pm

Step-by-step explanation:

Let

Speed of Nhan=3x km /hour

Speed of Phoung=4x km/hour

After 5 hours,

Distance covered by Nhan=3x(5)=15 xkm

Distance covered by Phuong=4x(5)=20x km

Total distance covered by Nhan to reach town B=15x+102 km

Total distance covered by Phuong to reach town B=20x+52 km

Distance between town A and town B for both person is same therefore,

$15x+102=20x+52$

$102-52=20x-15x$

$50=5x$

$x=10$

Speed of Nhan=3(10)=30 km/h

Speed of Phuong=4(10)=40 km/h

Total distance between town A and town B=102+15(10)=252 km

Time taken by Nhan to reach town B from town A= $\frac{distance}{speed}$

Time taken by Nhan to reach town B from town A= $\frac{252}{30}=8.4 hours$

$8.4 hours=8+0.4\times 60$

=8 hours 24 minutes

1 hour=60 minutes

Nhan reach town B at 13:24 pm

3 0

2 years ago