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lianna [129]
3 years ago
8

Y=-x-4 y=xsolve system of equations algebraically​

Mathematics
1 answer:
Serhud [2]3 years ago
4 0

Answer:

y=-2 x=-2

Step-by-step explanation:

y=-x-4

y=x

you can plug y in for x in the first equation by using substitution

y=-y-4

and then you solve for y

2y=-4

y=-2

so y equals -2. Since y=x, x also equals -2. Therefore

y=-2 x=-2

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Pure copper was mixed with a 10% copper alloy to produce an alloy thát was 25% copper. How much of the pure copper and how much
lora16 [44]

Answer:

6kg pure copper and 30 kg 10% copper was mixed to give 36kg of 25% alloy

Step-by-step explanation:

Here, we want to produce 36 kg of 25% alloy

Let the Pure copper be x kg while 10% alloy be y kg

Pure copper is simply 100% copper

Thus;

x + y = 36 •••••(i)

Then;

100% of x + 10% of y = 25% of 36

= x + 0.1y = 9 •••••• ii)

From i x = 36-y

from ii, x = 9-0.1y

Equate both x

36-y = 9-0.1y

36-9 = 0.1y + y

0.9y = 27

y = 27/0.9

y = 30

x = 36-y

x = 36-30

x = 6 kg

8 0
3 years ago
Which function has a different range than the function f(x)=bx?
kodGreya [7K]
The answer is D but i could be wrong
3 0
3 years ago
Help please Help please
Salsk061 [2.6K]

Answer:

50 mg for (dex) and 500 (gua) 50 times 4 is 200 for dex for ml mg is something else though. Also 500 times 4 is 2000 ml. So now just convert.

Step-by-step explanation:


3 0
3 years ago
What is 25/7 in simplest form
Triss [41]
7 is a prime number, which means it can't be simplified. This fraction is already in simplest form, also because 25 and 7 don't have any common factors.
7 0
3 years ago
Read 2 more answers
What is the distributive property of 18(12)
Lesechka [4]

The distributive property of 18(12), or simply 18 * 12, is 216. (This is your answer.)

7 0
3 years ago
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