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saveliy_v [14]
3 years ago
15

I need help now it’s an iready

Mathematics
1 answer:
schepotkina [342]3 years ago
3 0

answer:

21 + 3x (you would not put the x again since it is already given)

step-by-step explanation:

  • we have to distribute 3 to the expression in the parenthesis

3 (7 + x)

= 21 + 3x

  • this will be the expression once we distribute
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If c = 15 and y = 7, find the value of x.
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I can’t get the answer because I do not have my scientific calculator.

Step-by-step explanation:

15 squared - 7 squared = A squared then add 90. Then square root for the answer!

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A four-lane freeway (two lanes in each direction) operates at capacity during the peak hour. it has 11-ft lanes, 4-ft shoulders,
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Y= -23 +9<br> y = 42 - 3<br><br><br> PLEASE HELP
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Step-by-step explanation:

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mash [69]

Answer:

w < -7

____________________

You mean this thing one?

6 0
3 years ago
Learning task 2
patriot [66]

The given equations are

2x-3y=-1\cdots(i) \\\\y=x-1\cdots(ii)

(a) Solution by graphing both the equations:

Graph for both the equations (i) and (ii) are in the figure. The point of intersection of both the graph is the solution of the equations.

From the graph, the point of intersection is (4,3)).

Hence, the required solution is (4,3).

(b) Solution by elimination method:

Equations (ii) can be written as -x+y=-1, now multiply it by 2, we have

-2x+2y=-2\cdots(iii)

Add equations (i) and (iii), we have

2x-3y=-1

-2x+2y=-2

__________

\Rightarrow -3y+2y=-1-2\\\\ \Rightarrow -y=-3\\\\ \Rightarrow y=3.

Putting the value of y=3 in equation (i), we have

2x-3\times 3=-1 \\\\\Rightarrow 2x=-1+9=8 \\\\\Rightarrow x=8/2=4

Hence, the required solution is (4,4).

(c) Solution by substitution method:

Substituting the value of y from equation (ii) to equation (i), we have

2x-3(x-1)=-1 \\\\\Rightarrow 2x-3x+3=-1 \\\\\Rightarrow -x=-1-4=-4 \\\\\Rightarrow x=4

Putting the value of x=4 in equation (i), we have

y=4-1=3.

Hence, the required solution is (4,3).

3 0
3 years ago
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