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artcher [175]
3 years ago
7

PLEASEEEEEE HELPPPP!!!!

Mathematics
2 answers:
pogonyaev3 years ago
6 0
I believe this would be correct.

LUCKY_DIMON [66]3 years ago
6 0
This would be about correct!

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Solve 2(a + 7) = 5a - 13
timurjin [86]

Answer:

a = 9

Step-by-step explanation:

2(a + 7) = 5a - 13

We want to bring a to one side, I will choose to bring it to the right

First, expand the bracket by multiplying 2 with a + 7

2a + 14 = 5a - 13

Bring the -13 to the left by adding 13 to both sides

2a + 14 + 13 = 5a - 13 + 13

Simplify

2a + 27 = 5a

Bring the 2a to the right by subtracting 2a from both sides

2a - 2a + 27 = 5a - 2a

Simplify

27 = 5a - 2a

27 = 3a

Bring the 3 to the left by dividing both sides by 3

27÷3 = a

Simplify

a = 9

4 0
3 years ago
On Tuesday, Frankie had $154.50 in his bank account. On Wednesday, he withdrew $65.50 from his account. After depositing $275.25
myrzilka [38]
The answer is C (^‿^✿)

All you have to do is subtract 154.50 by 65.50 and add that answer to 275.25
3 0
3 years ago
The mean cost for a pint of frozen yogurt is $1.50, with a standard deviation of $0.10.
djverab [1.8K]

Answer:

The correct answer is:

0.01$ (c)

Step-by-step explanation:

Standard deviation is a measure of how spread out numbers are from the mean value. The formula for standard deviation is given by:

s = \sqrt{\frac{\sum(x - \bar x)}{n} } \\where:\\x = sample\ \\\bar x\ = mean\\n\ = number\ of\ samples\

Variance is a measure of the squared differences from the mean.

Variance is simply the square of the standard deviation. It is mathematically shown as:

s^2 = \frac{\sum(x - \bar x)}{n} }

Now in our example,

Stabnard deviation = $0.10

Variance = (standard deviation)²

Variance = (0.10)²

Variance = $0.01

6 0
3 years ago
(-0.42,0.91)
Brilliant_brown [7]

Answer:

\cos(\pi -\theta) = 0.42

\cos(2\pi +\theta) = -0.42

3 0
3 years ago
Joe runs 8.25 times around a track in 1,119.803 seconds. If one lap around the track is 402.3 meters, which is the best estimate
alexgriva [62]
2.96 meters per second is the answer I'm getting. I took the total seconds and divided it by how many times he ran around the track to get his speed for lap and then I divided his lap speed by how long the track was to get his meters per second
5 0
3 years ago
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