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3 years ago

128 is 74% of what number

1 answer:

5 0

Percent means parts out of 100
74%=74/100=0.74

'of' means multiply

so
128 is 74% of what means
128=0.74 times what
divide both sides by 0.74
172.97297297297297297297297297297=what
the number is about 173

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Pls help i dont get how to do this

Lorico [155]

Step-by-step explanation:

What this is saying is...20 is a whole number; but 3/4 is not. What they are saying is, if you have to add a mixed number with a whole number, you can add both of the whole numbers together. Then, you add the 3/4 at the end...because it is not a whole number. You can break apart a mixed number by separating the whole number and the fraction.

Hope this helps :)

3 0

3 years ago

Use in the elimination mentioned for this problem<br><br> 6x+5y=11<br> x+y =6

Oliga [24]

Answer:

{x = -19 , y = 25

Step-by-step explanation: System solved by elimination

Solve the following system:

{6 x + 5 y = 11 | (equation 1)

{x + y = 6 | (equation 2)

Subtract 1/6 × (equation 1) from equation 2:

{6 x + 5 y = 11 | (equation 1)

{0 x+y/6 = 25/6 | (equation 2)

Multiply equation 2 by 6:

{6 x + 5 y = 11 | (equation 1)

{0 x+y = 25 | (equation 2)

Subtract 5 × (equation 2) from equation 1:

{6 x+0 y = -114 | (equation 1)

{0 x+y = 25 | (equation 2)

Divide equation 1 by 6:

{x+0 y = -19 | (equation 1)

{0 x+y = 25 | (equation 2)

Collect results:

Answer: {x = -19 , y = 25

6 0

4 years ago

A circle its circumference is 75 cm calculate its surface area

Lana71 [14]

Circumference = πD

------------------------------------------------------------------------
Given that the circumference is 75cm, find Diameter:
------------------------------------------------------------------------
πD = 75
D = 75 ÷ 3.14
D = 23,89 cm

------------------------------------
Find Radius:
------------------------------------
Radius = Diameter ÷ 2
Radius = 23.89 ÷ 2
Radius = 11.94 cm

------------------------------------
Find Surface Area:
------------------------------------
Area = πr²
Area = 3.14 x 11.94²
Area = 447.65 cm²

------------------------------------
Answer: 447.65cm²
------------------------------------

5 0

3 years ago

A large box weigh 680 grams. A smaller box weighs 0.75 times the larger box. How much does the smaller box weigh?

enyata [817]

Answer:The smaller box weighs 510grams.

Step-by-step explanation:

Weight of large box = 680 grams

Weight of smaller box = 0.75 times ls larger box

Therefore Weight of Smaller box = 680 X 0.75

=510grams

5 0

3 years ago

I need to solve for x.

frosja888 [35]

That big triangle is made up of 2 congruent 30-60-90 triangles with each base measuring 4.5. You could use the tangent ratio to get tan60 = x / 4.5. Multiply both sides by 4.5 to get 4.5 tan60 = x. Do that on your calculator in degree mode to get that x = 7.79 or 7.8

6 0

3 years ago