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loris [4]
3 years ago
9

7x+y+3=y Graphing linear equations

Mathematics
1 answer:
PolarNik [594]3 years ago
5 0

Answer:

y=3.5x+1.5

Step-by-step explanation:

Move the y to the other side. 7x+3=2y

Divide by 2. 3.5x+1.5=y

Therefore the linear equation is y=3.5x+1.5

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How many quarts of pure antifreeze must be added to 8 quarts of a 40% antifreeze solution to obtain a 60% antifreeze solution
anyanavicka [17]

Let <em>q</em> be the number of quarts of pure antifreeze that needs to be added to get the desired solution.

8 quarts of 40% solution contains 0.40 × 8 = 3.2 quarts of antifreeze.

The new solution would have a total volume of 8 + <em>q</em> quarts, and it would contain a total amount of 3.2 + <em>q</em> quarts of antifreeze. You want to end up with a concentration of 60% antifreeze, which means

(3.2 + <em>q</em>) / (8 + <em>q</em>) = 0.60

Solve for <em>q</em> :

3.2 + <em>q</em> = 0.60 (8 + <em>q</em>)

3.2 + <em>q</em> = 4.8 + 0.6<em>q</em>

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<em>q</em> = 4

4 0
2 years ago
Find n(A) for A={0,1,2,3,...,2000}
miskamm [114]
There are 2001 items in that set.

So n(A) = 2001

We can individually count them all out, which is very slow and tedious, or we can use the formula
n-m+1

where,
m = starting value
n = ending value

In this case,
m = 0
n = 2000
So,
n-m+1 = 2000-0+1 = 2001

This formula only works if we increase the number by 1 each time (eg: 6, 7, 8, etc)
7 0
3 years ago
1. If a triangle of area 95 square units has a height of length 19 units, calculate
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48 I believe :) pls like I need points
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Evaluate using the correct order of operations: 12 - 2 ⋅ 4
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Answer:

8

Step-by-step explanation:

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40% of 149 is 59.60

149-59.60= 89.40

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