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Alina [70]
3 years ago
15

If 3x - 6 = 21, what is the value of x - 2 ?

Mathematics
1 answer:
lora16 [44]3 years ago
5 0
3x-6=21
Or,3x=27
Or,x=27/3
Or,x=9
So,Now,
X-2=9-2
=7
Hope it helps
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one side of a rectangle is 4cm shorter than three times the other side, find the side lengths if the area is 319
MakcuM [25]
I hope this helps you

5 0
3 years ago
What is the equation of the line that passes through the point (-6,-7)  and has a slope of 0?
Setler [38]
The equation of the line is y = -7. If the slope is zero, the line is flat.
7 0
3 years ago
What is the correct solution to this problem? A number divided by 5 is 3 more than –6. What is the number? A. –45 B. –30 C. –15
mihalych1998 [28]
<span>A number divided by 5 is 3 more than –6.
Let the number be "x".

x/5 = -6 + 3
First combine like terms.
x/5 = -3
Now multiply both sides by 5 to get x on one side.
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</span>
4 0
3 years ago
Read 2 more answers
A box contains 3 black pens, 7 blue pens, and 5 red pens. She pulls a red pen, puts it back, pulls a blue pen, puts it back, and
saveliy_v [14]

Answer:

7/25

Step-by-step explanation:

Probability is the likelihood or chance that an event will occur.

Probability = expected outcome/total outcome

If the box contains 3 black pens, 7 blue pens, and 5 red pens, the total number of pens in the box is 3+7+5 = 15pens

Probability of pulling a red pen and replacing = 5/15 = 1/3

Probability of pulling a blue pen and replacing = 7/15

Probability of pulling a black pen and not replacing(using it) = 3/15

{Note that the total number of outcome used will still be 15 since the black pen was pulled out last even though it wasn't replaced.}

P(red, then blue, then black) = 1/3×7/15×3/15

= 63/225

= 7/25

4 0
3 years ago
At the Canada Open Tennis Championship, a statistician keeps track of every serve that a player hits during the tournament. The
kondaur [170]

Answer:

a) 54 mph to 144 mph

Step-by-step explanation:

We don't know the shape of the distribution, so we use Chebyshev's Theorem to solve this question. It states that:

At least 75% of the measures are within 2 standard deviations of the mean.

At least 89% of the measures are within 3 standard deviations of the mean.

At least eight-ninths of the player's serves.

8/9 is approximately 89%

So

Mean: 99, standard deviation: 15

99 - 3*15 = 54

99 + 3*15 = 144

So the correct answer is:

a) 54 mph to 144 mph

8 0
3 years ago
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