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3 years ago

PLEASE HELP Which of the following questions are correct? Select all that apply.

Mathematics

1 answer:

gregori [183]3 years ago

5 0

Answer:

I think A and D are both correct

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Two trains, Train A and Train B, weigh a total of 149 tons. Train A is heavier than Train B. The difference of their weights i

SpyIntel [72]

Answer:

train a weighs 310 tons and train b weighs 303 tons

Step-by-step explanation:

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2 years ago

The sector of a circle has an area of 104pi/9 square inches and a central angle with measure 65 degrees. What is the radius of t

vagabundo [1.1K]

Answer: b : 8

Step-by-step explanation:

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2 years ago

Chose all the properties that were used to simplify the following problem

timofeeve [1]

(a+b) + c = a + (b + c)

re-arrange the numbers - associative property of addition

Answer

Associative property of addition

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2 years ago

One question simple please help

igor_vitrenko [27]

Answer:

$y = \frac{1}{3}x - 9$

Step-by-step explanation:

Standard equation of a line is y = mx + b, where m is the slope.

Given line y = - 3x + 78, slope, m₁ = -3

<em><u>To find the line perpendicular to the given line.</u></em>

The lines are perpendicular to each other if the product of their slopes = - 1

That is,

$m_1 \times m_2 = -1$

So the slope of new line is

$-3 \times m_2 = -1\\\\m_2 = \frac{-1}{-3} = \frac{1}{3}$

$Therefore , equation \ of \ new \ line \ \\\\(y - y_1) = m_2(x - x_1) , where \ (x_1 , y_1) = (9, -6 )\\\\(y - (-6))= \frac{1}{3}(x -9)\\\\y + 6 = \frac{1}{3} x - 3\\\\y = \frac{1}{3}x -3-6\\\\y = \frac{1}{3}x -9\\\\$

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3 years ago

Select all the equations that are true when x = 4

V125BC [204]

Answer:

B and E

Step-by-step explanation:

A. 8x = 2

8(4) = 2

32 = 2

B. 19 + x = 23

19 + 4 = 23

23 = 23

C. 40/x = 5

40/4 = 5

10 = 5

D. -3x = 12

-3(4) = 12

-12 = 12

E. x - x - x - x = -8

4 - 4 - 4 - 4 = -8

0 - 4 - 4 = -8

-4 - 4 = -8

-4 + (-4) = -8

-8 = -8

7 0

2 years ago