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san4es73 [151]
3 years ago
5

I'm using system of equations and I have to use either substitution or elimination. My two equations are

Mathematics
2 answers:
Pie3 years ago
5 0
You can multiply the equation of 2x by 4 so you can cancel out 8x
Art [367]3 years ago
4 0
Here’s the explanation and answer with both of the methods :)

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Simply 6 square root of 45
storchak [24]

Answer:

40.24922.........

Step-by-step explanation:

7 0
3 years ago
I NEED HELP FAST
deff fn [24]

The restaurant served 70 specials in all, 80% of which were salmon filets. It says to find salmon filets that the restaurant served last night.

So we just need to find 80% of 70.

Therefore, Number of Salmon Filets = 0.8*70 = 56.

Hence, the restaurant served 56 salmon filets.

5 0
3 years ago
Need this asap i need to find out which is a function but i get really confused on these things
lyudmila [28]

Answer:

Step-by-step explanation:

Use the "vertical line test."  Draw a vertical line through each graph.  If the line intersects the graph in more than one place, the graph does NOT represent a function.  Only the graph in the upper, right-hand corner represents a function, as a vertical line intersects this graph in only one place.

6 0
3 years ago
What is the complete factprization -18a^2+8?
kodGreya [7K]

Answer:

(-6a+4)(3a+2)

Step-by-step explanation:

(-6a+4)(3a+2)

-18a^2+12a-12a+8 (checking answer)

-18a^2+8

8 0
3 years ago
Read 2 more answers
, Ohio in 1990, the number of residents has decreased by 5% every 5 years. In 1990, there were 182,000 residents in Dayton, Ohio
Sphinxa [80]

Answer:

133,787 residents

Step-by-step explanation:

First thing we need to do here is calculate the number of 5 years between 2020 and 1990

That would be 2020-1990 = 30/5 = 6

Now to estimate the present population, we will be needing an exponential equation

P = I(1-r)^n

where P is the present population at 2020

I is the population at 1990 which is 182,000

r is the percentage decrease every 5 years which is 5% or simply 5/100 = 0.05

n is the number of 5 years between 1990 and 2020 which is 6

Plugging all these values we have;

P = 182000(1-0.05)^6

P = 182000(0.95)^6

P = 133,786.724

To the nearest whole number, P = 133,787 residents

3 0
3 years ago
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