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satela [25.4K]
3 years ago
14

Evaluate... k/2 + 9 = 30

Mathematics
2 answers:
Scrat [10]3 years ago
8 0
Given: K/2+9=30
Or, k/2=30-9
K/2=21
K=21*2
K=42
Simora [160]3 years ago
4 0

Answer:

K = 42

Step-by-step explanation:

K/2 = 21

2* k/2 =2*21

k=42

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How do I solve this type of problem? I'm trying to find both missing values. Please explain how to solve this as thoroughly as y
goldenfox [79]
Hi there! 

In order to solve, we'll need to use a proportion: 20/a = 21/20. Then, we'll cross-multiply and solve to find a: 21a = 400 | a = 19.05. Next, to find b, we can just use pythagorean theorem: 20^2 + (400/21)^2 = b^2 | b = 27.62.
We are using geometric mean to solve for a, then using pythagorean theorem to solve for b. If you need more help with geometric mean, or would like a complete explanation, please let me know! I'd be happy to provide you with that information.

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3 0
3 years ago
Add 3/7 + 8/9 . Simplify the answer and write as a mixed number
Fudgin [204]
You will get both of the fractions over the same denominator, so it will be 27/63 and 56/63, then you will add the two numerators, so it will then come out to 83/63, and you will then simplify that by subtracting 63 from 83, and will get 1  20/63
5 0
3 years ago
You need 20 pounds of grass seed to plant grass inside the baseball diamond below. About how many pounds of grass seed
taurus [48]

Answer:

13 pounds of grass.

Step-by-step explanation:

You need 20 pounds of grass seed to plant inside the baseball diamond.

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The ratio of the size of the Baseball Diamond to that of Softball Diamond is:

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If 3 represents 20 pounds, then 2 represents;

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6 0
3 years ago
1/2 × s for s = 3/10
Sauron [17]

Answer:

Step-by-step explanation:

1/2s......when s = 3/10

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8 0
3 years ago
Read 2 more answers
PLS HELP!! 30 points!
Ksenya-84 [330]

Answer:

² is the answer i think

Step-by-step explanation:

3 0
3 years ago
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