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3 years ago

How much of an alloy that is 10 percent copper should be mixed with 500 ounces of an alloy that is 90?

1 answer:

6 0

So 500ounces is 90% of the alloy.
So 500:90
Now divide both sides by 9.
500/9:10
So thats
55.56:10 or
55 5/9:10
Or keep it as
500/9:10

You might be interested in

Find the gradients of line a and b

34kurt

Answer:

3 and - 4

Step-by-step explanation:

Calculate the gradients using the slope formula

m = (y₂ - y₁ ) / (x₂ - x₁ )

Line A

with (x₁, y₁ ) = (0, - 2) and (x₂, y₂ ) = (1, 1) ← 2 points on the line

m = $\frac{1+2}{1-0}$ = 3

Line B

with (x₁, y₁ ) = (1, 1) and (x₂, y₂ ) = (0, 5) ← 2 points on the line

m = $\frac{5-1}{0-1}$ = $\frac{4}{-1}$ = - 4

7 0

3 years ago

Help meeeeeeeeeeeeeeeee

Olenka [21]

Answer:

its A and D

Step-by-step explanation:

You see, the 7v-3w is the same as 7(3w+3)

I think so! Sorry if I'm wrong! I don't mean to give you any trouble. I hope you get it right!

doremifasolatido! lol

7 0

3 years ago

A student computed the average of her 7 test scores by adding the scores together and dividing this total by the number of tests

mina [271]

After the new test, she now has taken 8 tests.
Set it up just like when finding the average:
(87+79)/8
Solve for the new test average

7 0

4 years ago

What is marginal joint and conditional relative frequency and what is the differences

neonofarm [45]

Answer:

Marginal relative frequency is the ratio of the sum of the joint relative frequency in a row or column and the total number of data values. ... Conditional relative frequency numbers are the ratio of a joint relative frequency and related marginal relative frequency.

Step-by-step explanation:

Happy to help! Have a wonderful day!

-Alaska

8 0

4 years ago

-4х + 5y=— 28<br> 4x – 3y = 20

ZanzabumX [31]

I hope it's correct and it helps I don't know how to explain it lol

3 0

3 years ago