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vampirchik [111]
4 years ago
11

What is the sum of x + 9?

Mathematics
1 answer:
vovikov84 [41]4 years ago
5 0
So 30/48=15/(x+9)
this could be easily solved by recognizing the proportion (the other way is usiing full  algebra and doing multiply both sides by 48(x+9) and then divide both sides by 30 then subtract 9)
30 is 2 times of 15
therefor 48 is 2 times of (x+9)
48=2 times (x+9)
divide both sides by 2
24=x+9
subtract 9
15=x

x=15

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18 is 25% of what number?<br> A 36<br> B) 48<br> C с<br> 72<br> D) 84
ella [17]

Answer:

C. 72

Hope it helps :)

4 0
3 years ago
1/9-1/x divided by 1/81-1/x2
dedylja [7]

STEP

1

:

           1

Simplify   —

           x

Equation at the end of step

1

:

 1    1

 — -  —

 9    x

STEP

2

:

           1

Simplify   —

           9

Equation at the end of step

2

:

 1    1

 — -  —

 9    x

STEP

1

:

            1

Simplify   ——

           x2

Equation at the end of step

1

:

  1 1      1  1

 (—-—) ÷ (——-——)

  9 x     81 x2

STEP

2

:

            1

Simplify   ——

           81

Equation at the end of step

2

:

  1    1      1     1

 (— -  —) ÷ (—— -  ——)

  9    x     81    x2

(9x)/(x+9)-:(x-9)/(9x)

7 0
4 years ago
3 to the 2 power times 5 to the 3 times 8 divided by 3 times 5 to the 3 times 8
IceJOKER [234]

Answer:

42

Step-by-step explanation:

First condense all the numbers with exponents:

3² x 5³x 8 divided by 3 x 5³ x 8

27 x 125 x 8  divided by 3 x 27 x 8

Then multiply 27 , 125 ,and 8

27 x 125 x 8 =27000

Then multiply 3, 27 ,and 8

3 x 27 x 8 = 648

Then divide 27000 by 648

27000 / 648 = 41.6666666667

Which rounds to about: 42

3 0
4 years ago
A box of shredded wheat wheat weighs 0.35 .kg and a box of weetabix weighs 9/25 kg. Which box is heavier? Show your work.
MAXImum [283]

Answer:

weetablx is heavier

Step-by-step explanation:

lets simplify

wheat wheat - 0.35 kg

weetablx - 9/25

simplify into decimals

wheat wheat- 0.35 kg

weetablx- 0.36 kg

brainliest appreciated!

7 0
4 years ago
Is -10x^8 a monomial.?
tensa zangetsu [6.8K]
Yep! because there is no +,-, ect. sign. in total it is just one number
7 0
3 years ago
Read 2 more answers
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