MATHEMATICS HIGH SCHOOL

42 = -7 (z - 3)

z = ?

Answers

Answer 1
Answer:

Answer:

The answer to your question is z = -3

Step-by-step explanation:

Expand                 42 = -7(z - 3)

                             42 = -7z + 21

Simplify                 7z = -42 + 21

                             7z = -21

Clear z                    z = (-21)/(7)

                              z = -3                                                            

Answer 2
Answer: 42=-7z+21
42-21=-7z
21/-7=-7z/-7
-3=z

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Jac thinks of a number. 25% of his number is 35. What is 1/10 of Jac's number?​

Answers

Answer:

Step-by-step explanation:

Let Jack’s number be x.

25% of x = 35

(25/100) . x = 35

x = 35 . 4 = 140

So Jack’s number is 140. 1/10 of 140 will be (1/10). 140 = 14

Answer: 14

={125},={#125}andQ={#125},
finda. ∪ b. ∩ c. d.

Answers

Answer:

h3llo

Step-by-step explanation:

hey the answer is in your heart

Solve for x 3x + 3 - x + (-7) > 6

Answers

it is a simple linear inequalitie, lets solve it:
3x + 3 - x + (-7) > 6
3x + 3 - x - 7 > 6
2x - 4 > 6
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Find the unit rate: 6 yards of fabric for $8.10

Answers

Answer:

$1.35 per yard

Step-by-step explanation:

$8.10/6=$1.35

Answer:

$1.35

Step-by-step explanation:

$8.10 divided by 6

Apples lose 85% of their weight while drying. What weight of fresh apples do you need to pick in order to get 10.5 lb of dried apples?

Answers

Answer:

70\ lb

Step-by-step explanation:

Let

x------>  weight of fresh apples

we know that

85\%=(85)/(100)=0.85

(1-0.85)x=10.5

0.15x=10.5

Solve for x

Divide by 0.15 both sides

x=10.5/0.15

x=70\ lb

Answer:

Step-by-step explanation:

70 pounds

If t is any real number, prove that 1+(tant)^2=(sect)^2

Answers

1+\left(tant\right)^2=\left(sect\right)^2\n\nL=1+\left((sint)/(cost)\right)^2=1+(sin^2t)/(cos^2t)=(cos^2t)/(cos^2t)+(sin^2t)/(cos^2t)=(cos^2t+sin^2)/(cos^2t)=(1)/(cos^2t)\n\n=\left((1)/(cost)\right)^2=(sect)^2=R\n\n====================================\n\n\ntanx=(sinx)/(cosx)\n\nsin^2x+cos^2x=1\n\nsecx=(1)/(cosx)
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