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Fed [463]
3 years ago
14

Is this correct? If not please help me out.

Mathematics
1 answer:
never [62]3 years ago
4 0
Yes I believe so !!!
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An alloy is a mixture of metals. Suppose that a certain alloy is made by mixing 50 g of an alloy containing 12% copper with 78 g
givi [52]

Given :

An alloy is a mixture of metals. Suppose that a certain alloy is made by mixing 50 g of an alloy containing 12% copper with 78 g of an alloy containing 92% copper.

To Find :

How many grams of copper are in the resulting mixture what percentage of the resulting mixture is copper.

Solution :

Mass of copper in 50 gm alloy = 50\times 0.12 = 6\ gram.

Mass of copper in 78 gm alloy = 78\times 0.98 = 76.44\ gram.

Total mass of copper, ( 6 + 76.44 ) gm = 82.44 gram.

Percentage of copper in resulting mixture :

\%=\dfrac{82.44}{50+78}\\\\\%=64.4\ \%

Hence, this is the required solution.

8 0
3 years ago
Which of the following equations describes the line shown
wariber [46]
(-4,4) (2,1)
gradient = (1-4)/(2--4) = -1/2
y = mx + c
y = -1/2x + c
Replace point (2,1) in the equation
1=-1/2(2) +c
c = 2
Equation : y = -1/2x + 2
y-2 = -1/2x
Answer is C.
Hope it helped!
6 0
3 years ago
Which unit rates would be appropriate for describing the speed of cars in a race?
meriva

Answer:

Miles per hours and feet per second.

Hope this helps! Jesus loves you! :)

-Seth


5 0
3 years ago
Two cars traveling toward each other are 250 miles apart. Car a is traveling 15 miles per hour faster than car
Anon25 [30]

Let car  b be travelling at x  mph.  as they are travelling towards each other their speed of approach is (x + x + 15 ) mph.  So we have the equation

speed = distance / time

2x + 15 =  250 / 2

2x = 125 - 15 = 110

x = 55 mph

Car b travels at 55 mph and car a travels at 70 mph  Answer

3 0
3 years ago
A old computer model that cost $599(whole) is marked down 5%. How much money will the customer save (what is the discount only)?
Butoxors [25]

Answer:

The discount is 29.95

Step-by-step explanation:

599 x .05= 29.95

8 0
3 years ago
Read 2 more answers
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