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pychu [463]
3 years ago
14

Solve. X-9 = 12 .....

Mathematics
2 answers:
Lelechka [254]3 years ago
5 0

Answer:

x=21

Step-by-step explanation:

x=9+12 x=21

kumpel [21]3 years ago
3 0

Answer:

Step-by-step explanation:

X-9=12

Reverse the operation into

9+12=x

9+12=21

Now check

21-9=12

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Determine if y varies directly with x. Give the constant of variation, when appropriate. (picture below)
maxonik [38]

Based on the given variation, y does not vary directly with x and the constant of variation are 8, 3.2 and 1.25 respectively.

<h3>Variation</h3>

y = k × x

where,

k = constant of proportionality

y = -40

x = -5

y = k × x

-40 = k × -5

-40 = -5k

k = -40/-5

k = 8

when,

y = 8 and x = 2.5

y = k × x

8 = k × 2.5

8 = 2.5k

k = 8/2.5

k = 3.2

when,

y = 5 and x = 4

y = k × x

5 = k × 4

5 = 4k

k = 5/4

k = 1.25

Learn more about variation:

brainly.com/question/6499629

#SPJ1

5 0
2 years ago
2,000,999,600,000 / 7,999,8800,500,000,500 <br> -10,00000, hrs and mins together?
Ymorist [56]

Answer:

Step-by-step explanation:

God no!

5 0
3 years ago
Read 2 more answers
Can somebody help me asap.
ehidna [41]

Answer:

Step-by-step explanation:

1) m∠1 +m∠2 + m∠3 = m∠LAM (Angle addition postulate)

2) m∠1 + m∠2 + m∠3 = 180 (def. of straight angle)

3) y║z (Given)

4) ∠1 ≅ ∠5 (alternate interior angles theorem)

5) ∠3 ≅ ∠6 (alternate interior angles theorem)

6) Since m∠1 + m∠2 + m∠3 = 180

m∠5 + m∠2 + m∠6 = 180

Hence proved.

7 0
3 years ago
The population in Smalltown in 2010 was 45,230 people and is growing exponentially at a rate of 2%. What will the population be
Luden [163]

Answer:

Let P(t) = population t years after 2010

           = 45230e0.02t

Population in 2030 = P(20)

                           = 45230e0.4≈ 6747

3 0
2 years ago
6a^2-[-5a-(9a^2-3a)]-[8+(-19a-8)]
Mamont248 [21]
The answer is 15a^2+21a
5 0
3 years ago
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