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Over [174]
3 years ago
9

How does the associative property of multiplication help you to calculate products mentally?

Mathematics
1 answer:
Neko [114]3 years ago
5 0
It shows you what to do first (don't quote me o. this only use this if you can't find any other answer)
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39. Solve this system: 3x+y=-7 . 4x-y=14A. (–1, 10)B. (1, –10)C. (–1, –10)D. no solution
valkas [14]

Given,

The linear pair of the equation is,

\begin{gathered} 3x+y=-7 \\ 4x-y=14 \end{gathered}

Required

The solution of the linear equation.

Taking the equation first as,

\begin{gathered} 3x+y=-7 \\ y=-7-3x \end{gathered}

Substituting the value of y in second equation then,

\begin{gathered} 4x-y=14 \\ 4x+7+3x=14 \\ 7x+7=14 \\ 7x=7 \\ x=1 \end{gathered}

Substituting the value of x in first equation then,

\begin{gathered} 3x+y=-7 \\ 3(1)+y=-7 \\ y=-7-3 \\ y=-10 \end{gathered}

Hence, the solution of the system is (1, -10).

8 0
1 year ago
<img src="https://tex.z-dn.net/?f=%20%5Cfrac%7B%20log%288%29%20%7D%7Blog%282%29%20%7D%20" id="TexFormula1" title=" \frac{ log(8)
brilliants [131]

Answer:

\frac{log(8)}{log(2)}  = 3

Good luck friend, I really hope this helps ya :)

7 0
2 years ago
The second largest prime factor of 38 is
Kobotan [32]
I'll post one, because I disagree with everybody so far.

All the factors of 38 are 1, 2, 19, and 38.

The primes are 2 and 19.

The second largest prime factor is 2 .
6 0
3 years ago
Read 2 more answers
The graph below shows the annual cost (green) and sales (red) of a company. What is the break-even point?
s344n2d4d5 [400]

The break-even point for the graph is at 11 units.

Step-by-step explanation:

Break-even point refers to the point on the graph where either of the parameters of the graph intercepts each other. The corresponding location of the position where the intersection occurs gives the break-even point.

In the graph annual cost is plotted in green on the Y axis, while the sales are plotted on x-axis in red.

When we observe the graph carefully, we find that two-line intercepts. When the point at which interception occurs is extended on the x-axis, the point is 11 units, which gives us the break-even units.

Hence the point is 11 units.

3 0
3 years ago
Four more than a number, n, is no more of thirteen.
Dimas [21]

Answer:

n+4=<13

replace =< with less than or equal to (the < with an extra line under)

8 0
2 years ago
Read 2 more answers
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