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LenaWriter [7]
3 years ago
12

He system of equations can be solved using linear combination to eliminate one of the variables.

Mathematics
2 answers:
Ne4ueva [31]3 years ago
7 0
Answer is 13x=39 
Just took a test and it was right!
Sindrei [870]3 years ago
7 0

the answer is D 13x = 39

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I just need help, *uploaded again*
Svet_ta [14]

Answer:

Your answer for the first one is B

Step-by-step explanation:

7 0
2 years ago
In January, Angelina made one deposit of $90 to her savings account and made 3 withdrawals of $40 each. What was the total chang
Anna71 [15]
So 90 - (40*3) right ?
5 0
3 years ago
Read 2 more answers
Please help someone
Romashka-Z-Leto [24]

Answer:

  (-2, ∞)

Step-by-step explanation:

A function is "increasing" when its graph goes up to the right, the slope is positive. At a turning point (maximum or minimum), the function is neither increasing nor decreasing.

<h3>Increasing interval</h3>

The graph has a minimum at x = -2. To the left of that point, the graph goes up to the left, which is the same as down to the right (decreasing).

To the right of x = -2, the graph goes up to the right (increasing). It continues to increase for all values of x > 2. The interval where the function is increasing is said to be ...

  -2 < x < ∞

The lack of "or equal to" tells you the interval is "open" and is delimited by parentheses in interval notation:

  increasing; (-2, ∞)

6 0
2 years ago
The operating costs for each machine for one day have an unknown distribution with mean 1610 and standard deviation 136 dollars.
BabaBlast [244]

Answer:

20.27

Step-by-step explanation:

The Central Limit Theorem estabilishes that, for a random variable X, with mean \mu and standard deviation \sigma, the sample means with size n of at least 30 can be approximated to a normal distribution with mean \mu and standard deviation s = \frac{\sigma}{\sqrt{n}}

Using the Central Limit Theorem for Means, what is the standard deviation for the sample mean distribution?

This is s when \sigma = 136, n = 45. So

s = \frac{136}{\sqrt{45}} = 20.27

So the correct answer is:

20.27

3 0
3 years ago
A3 + a + a2 + 5 + 7a2 + 4a - 8a2 - 6 =
mamaluj [8]

Answer:

3 + 5 − 1

explination

6 0
3 years ago
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