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Tom [10]
3 years ago
6

5(2x+6)=-4(-5-2x)+3x step by step

Mathematics
1 answer:
Oksi-84 [34.3K]3 years ago
5 0

Answer:

x = 10

Step-by-step explanation:

Okay, let's solve :)

So first we have to distribute on the left side(it doesn't matter which side FYI)

When we do, we have :

10x + 30 = -4(-5-2x)

Now we distribute on the right side! Remember, negative * negative = positive.

10x + 30 = 20 + 8x + 3x

Let's simplify on the right side to

10x + 30 = 20 + 11x

Now, let's subtract 10x on both sides to get

x + 20 = 30(i simply flipped the equation)

Subtract 20 on both sides to get!

x = 10!

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Suppose that grade point averages of undergraduate students at one university have a bell-shaped distribution with a mean of 2.5
katovenus [111]

Answer:

95% of the students have grade point averages that are between 1.76 and 3.28

Step-by-step explanation:

The Empirical Rule states that, for a normally distributed random variable:

68% of the measures are within 1 standard deviation of the mean.

95% of the measures are within 2 standard deviation of the mean.

99.7% of the measures are within 3 standard deviations of the mean.

In this problem, we have that:

Mean = 2.52

Standard deviation = 0.38

Using the empirical rule, what percentage of the students have grade point averages that are between 1.76 and 3.28

1.76 = 2.52 - 2*0.38

So 1.76 is two standard deviations below the mean.

3.28 = 2.52 + 2*0.38

So 3.28 is two standard deviations above the mean

By the Empirical rule, 95% of the students have grade point averages that are between 1.76 and 3.28

6 0
4 years ago
1 3/4 + 1 + y = 4 1/3 <br><br> what does the ‘y’ represent?
castortr0y [4]
The answer is y=1 12/17
3 0
3 years ago
Read 2 more answers
Matteo has &amp;400 in his saving account. on average he spends $10 per week on buying apps. Luca has $200 in his savings accoun
Pavel [41]

Answer:

8 weeks

Step-by-step explanation:

Given data

Matteo

Amount= $400

Spending per week= $10

Hence his balance after x weeks is given as

y=400-10x-------------1

Luca

Amount= $200

Spending per week= $15

Hence his balance after x weeks is given as

y=200+15x-------------2

Equate 1 and 2

400-10x=200+15x

collect like terms

400-200=15x+10x

200=25x

x= 200/25

x= 8 weeks

Hence it will take 8 weeks

3 0
3 years ago
Question 2
shutvik [7]

9514 1404 393

Answer:

  45°, 45°, 90°

Step-by-step explanation:

If the difference of two angles is 0°, then they are congruent, and the triangle is isosceles.

The angle measures of the isosceles right triangle are 45°, 45°, 90°.

5 0
3 years ago
Use the fact that trigonometric functions are periodic to find the exact value of the expression. Do not use a calculator.
Fofino [41]
1080-360 = 720
720-360=360
360-360=0

so tan 1080 = tan 0 = 0
7 0
4 years ago
Read 2 more answers
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