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3 years ago

Please help I am stuck on this equation

Mathematics

2 answers:

Ugo [173]3 years ago

6 0

Answer:

Andre made a mistake in the first part of the equation when he was distributing.

Step-by-step explanation:

He got the 1/4x but forgot to distribute to the 12 which would have gotten him 1/4x + 3

levacccp [35]3 years ago

3 0

Answer:

Distribution

Step-by-step explanation:

On the second step he distributed the 1/4 to x, but not to twelve.

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Let A and B be two disjoint events such that P(A) = .30 and P(B) = .60. What is P(A and B)? 0.18 0.72 0.90 0 none of the above

antiseptic1488 [7]

Answer:

Step-by-step explanation:

If two events are disjoing (aka mutually exclusive) that means that there is 0 overlap or the intersection equals 0

So the probability of A <em>and </em>B occuring is 0 (because P(A∩B)= 0)

4 0

3 years ago

Find the lateral and surface area of each cone

Sophie [7]

Answer:

$\large\boxed{L.A.=153\pi\ mm^2}\\\boxed{S.A.234\pi\ mm^2}$

Step-by-step explanation:

The formula of a lateral area of a cone:

$L.A.=\pi rl$

r - radius

l - slant height

The formula of a surface area of a cone:

$S.A.=\pi r^2+\pi rl$

We have r= 9mm and l = 17mm. Substitute:

$L.A.=\pi(9)(17)=153\pi\ mm^2$

$S.A.=\pi(9^2)+153\pi=81\pi+153\pi=234\pi\ mm^2$

7 0

3 years ago

18. For the following exercises, use the descriptions of each pair of lines given below to find the slopes of Line 1 and Line

dolphi86 [110]

Answer:

The given lines are parallel.

Step-by-step explanation:

In the question, two lines are given as line 1 passes through (0,6) and (3,-24). Whereas, line 2 passes through (-1,19) and (8,-71).

It is required to find the slope of given lines and figure out whether they are perpendicular, parallel or neither.

To solve this question, first find the slope of both lines. Check if their product is equal to -1, then they are perpendicular. If the slopes are equal the lines are parallel

Step 1 of 2

Find the slope of first line.

$\begin{aligned}&m_{1}=\frac{-24-6}{3-0} \\&m_{1}=\frac{-30}{3} \\&m_{1}=-10\end{aligned}$

Step 2 of 2

Find the slope of first line.

$\begin{aligned}&m_{2}=\frac{-71-19}{8-(-1)} \\&m_{2}=\frac{-90}{9} \\&m_{2}=-10\end{aligned}$

Since, both slopes are equal.

Therefore, the lines are parallel.

6 0

2 years ago

BRAINLIESTTT ASAP! PLEASE HELP ME :)

svp [43]

Answer:

-42

Step-by-step explanation:

directly means y = kx where k is a constant. you have to first find the constant.

$y = kx\\36 = k (-12)\\-3 = k$

now you have your equation $y = -3x$

so you simply plug in x and find y

$y = -3 (14)\\y = -42$

4 0

3 years ago

PLEASE HELP! WILL GIVE BRAINLIEST!

Ivenika [448]

Answer:

40 mph.

Step-by-step explanation:

Hope I helped!

x-5=speed of car B

x=speed of car A

distance=speed times time

(x-5)(4.5)=(x)(4)

4.5x-22.5=4x

Multiply both sides by 2 to get rid of the decimals.

9x-45=8x

Subtract 8x from each side.

x-45=0 9 (A)

Add 45 to both sides.

x=45

Speed of car A=45 mph

Speed of car B=40 mph

6 0

3 years ago

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