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Pavlova-9 [17]
3 years ago
15

10x-15=-8x+21 solve this equation

Mathematics
1 answer:
Natasha2012 [34]3 years ago
8 0

Answer:

x=2

Step-by-step explanation:

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How do I find the sides of a right triangle using sine, cos, or tan, with only the three angles and the hypotenuse
Yuki888 [10]

In this right triangle, you are given the measurements for the hypotenuse, c, and one leg, b. The hypotenuse is always opposite the right angle and it is always the longest side of the triangle. To find the length of leg a, substitute the known values into the Pythagorean Theorem. Solve for a2.

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3 years ago
Graph the following inequality on the number line above. 3x < 12
irina [24]
Take the three and divide it with the 12 which would get you 4 so put a open circle Above the 4 and make the line go to the left I think I hope this will help
4 0
3 years ago
Find the sum of the first 63 terms of –19, -13, -7 …
Degger [83]

You can tell this is an arithmetic sequence because it is a list of terms beginning with -19 that increase by 6 each term. Because of this, we can use the formula for the sum of an arithmetic sequence, which is:

S = \dfrac{n}{2}[2 a_1 + d(n - 1)]

  • n is the number of terms in the sequence
  • a_1 is the starting term
  • d is the common difference among the terms

In this case, we can see that n = 63, a_1 = -19, and d = 6. Thus, we can use the formula:

S = \dfrac{63}{2} [2(-19) + 6(62)] = 10,521


Our answer is 10,521.


7 0
3 years ago
Olivia lives in a house that is 9 meters below sea level. Olivia goes to school every day, which is 5 meters above sea level how
zhenek [66]

Answer:

I wanna say the answer is 14

Step-by-step explanation:

The answer would be 14 because you are going from -9 to 5 which you just take the difference between the two numbers and the difference is 14.

Hope it helps!

5 0
3 years ago
If two data points are 10 and 20, what data point would make 30 the mean?​
Elena L [17]

Answer:

60

Step-by-step explanation:

The mean of a set of numbers is calculated by adding them all together and then dividing the sum by the amount of values in the data set. In this scenario, we know the mean is 30, and there are 3 numbers in the data set, 10, 20, and an unknown number (x).

Let's set up an equation with the information we have.

30 = (10 + 20 + x) / 3

Now we can multiply both sides by 3 ==>

90 = 10 + 20 + x

Combine like terms ==>

90 = 30 + x

Subtract 30 from each side ==>

60 = x

And now you have your answer!

The value of x = 60 would make the mean of the data set 30.

7 0
2 years ago
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