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4 years ago

Solve for k: 31 - 3k = 10

Mathematics

2 answers:

mash [69]4 years ago

8 0

Answer:

k=-7

Step-by-step explanation:

31-3k=10

31-31=0 10-31=-21

-3k=-21 -3/3=0

-21/3=-7

k=-7

Crazy boy [7]4 years ago

5 0

Answer:

k = 7

Step-by-step explanation:

Step 1: Write equation

31 - 3k = 10

Step 2: Solve for k

Subtract 31 on both sides: -3k = -21
Divide both sides by -3: k = 7

Step 3: Check

Plug in k to verify it's a solution.

31 - 3(7) = 10

31 - 21 = 10

10 = 10

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John has $1 in a savings account that earns 5% interest compounded annually

kiruha [24]

Answer:

16 cents

Step-by-step explanation:

A = P (1 + r)n

A = $1 (1 + 0.05)3

A = $1 x 1.16

A = $1.16

To find the compound interest only;

Compound Interest = Final Value - Initial Value

Compound Interest = $1.16 - $1

Compound Interest = $0.16

Hence the compound interest John will earn in his savings account will be 16 cents.

3 0

4 years ago

Three workers sort 66 boxes in a day. One of the workers is three times more productive than the second worker and twice as prod

Lelechka [254]

1 worker $=x$

2 worker $= \frac{worker1}{2}= \frac{x}{3}$

3 worker $= \frac{worker1}{3}= \frac{x}{3}$

so:

$66=x+ \frac{x}{3}+ \frac{x}{2}$

$66=x+\frac{2x}{6}+ \frac{3x}{6}$

$66*6=6x+2x+3x$

$396=11x$

$x=36$

so:

worker $1$ sorted $36$ boxes
worker $2$ sorted $18$ boxes
worker $3$ sorted $12$ boxes