75 is what percent of 60

Mathematics

1 answer:

VLD [36.1K]4 years ago

7 0

75 is 125% of 60. Hope this helps! :)

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A metalworker has a metal alloy that is 30% copper and another alloy that is 55% copper. How many kilograms of each alloy shou

Ilya [14]

<h3>Answer:</h3>

32 kg of 30% copper
48 kg of 55% copper

<h3>Step-by-step explanation:</h3>

Let x represent the mass of 55% copper alloy that is to be used in the mix. Then 80-x is the mass of 30% copper alloy to be used. The total amount of copper in the mix is then ...

... 0.55x + 0.30(80-x) = 0.45·80

... 0.25x = 12 . . . . . . simplify, subtract 24

... x = 48 . . . . . . . . . divide by the coefficient of x

... 80-x = 32 . . . . . . the mass of 30% copper alloy required

The metalworker should combine 32 kg of 30% copper alloy with 48 kg of 55% copper alloy to make 80 kg of 45% copper alloy.

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3 years ago

A = 7x2 - 3x + 10

Whitepunk [10]

Answer:

A - B = 11x² -9x + 14

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3 years ago

What is the value of the expression below?<br><br> 0.72/0.36*2

Tanya [424]

Answer:

Step-by-step explanation:

0.72/0.36 x 2

0.72/0.72

I'm always happy to help :)

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4 years ago

Dane is 10 times Brian's age. The difference in their age is 27, how old is Brian

WARRIOR [948]

Brian is 3 years old.
Hope this helps!

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3 years ago

Read 2 more answers

I need help understanding how to do the problem

notsponge [240]

So.. if you notice the picture below

is really just 3/4 of a cylinder, or, a full cylinder, and then you slice 1/4 off of it
notice the right-angle in your picture at the bottom, is cut at a right-angle, meaning, the cutout is 1/4 of the volume

so $\bf \textit{volume of a cylinder}\\\\
V=\pi r^2 h\qquad 
\begin{cases}
r=radius\\
h=height
\end{cases}\qquad \frac{3}{4}\textit{ of that}\implies \cfrac{3}{4}\cdot \pi r^2 h$

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3 years ago