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Sliva [168]
3 years ago
8

15. • Solve the simultaneous equations

Mathematics
1 answer:
tamaranim1 [39]3 years ago
5 0
Answer:
B. 1 and -2
Explanation:
First, add up the equations:
x-x+3y+y=4
4y=4
y=1
Now, plug y into any of the original equations above and solve for x:
-x+1=3
-x=2
x=-2
Therefore, the answer is B. 1 and -2
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Add 212+(−13) . Write your answer as a mixed number in simplest form.
nordsb [41]

The value of the given expression after addition is 199 and this can not written as a mixed number in the simplest form.

According to the question,

We have the following expression:

212+(-13)

Now, we know that the multiplication of one negative and one positive integers is always positive.

So, we have the following expression:

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199

Now, this number is whole number and it can not be written as a mixed number. It could only have been written as a mixed number when the result would have been in a fraction.

Hence, the value of the given expression after addition is 199 and this can not written as a mixed number in the simplest form.

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How do I solve 1/6 x 2.00=
marysya [2.9K]

Answer:

1/3

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2 years ago
Describe the graph of the function. y = |x + 2|
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A chart would include

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The number of mold cells doubles every 12 minutes. At this moment, there are x mold cells present on a piece of bread. Which of
lisabon 2012 [21]

Answer:

Step-by-step explanation:

Suppose that at time t_0 we have x mold cells. We are told that after 12 minutes the amount present is double. That is a t= t_0+12 we have 2x cells. Then, at t = t_0+24 we have (2x)*2 = 4x. We can continue as follows

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t: t_0+60 (one hour later) we have (16x)*2 = 32x.

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3 years ago
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