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nika2105 [10]
2 years ago
13

HELP PLEASE 100 points and I'll mark you brainliest

Mathematics
2 answers:
artcher [175]2 years ago
5 0

Answer:

180 = 150m + c

177.25 mm

Step-by-step explanation:

L = mT + c

180 = m(150) + c

180 = 150m + c

c = 180 - 150m

181.5 = 210m + c

181.5 = 210m + 180 - 150m

1.5 = 60m

m = 0.025

c = 180 - 150(0.025)

c = 180 - 3.75

c = 176.25

L = 0.025T + 176.25

T = 40

L = 0.025(40) +176.25

L = 177.25 mn

Ghella [55]2 years ago
4 0

Answer for the first question:

180=m(150)+c

Answer for the second question:

The~answer~is~attached~down~below

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23 + 8m + 4n - 5m - 27​
mylen [45]

Answer:

-4 + 3m + 4n

Step-by-step explanation:

In this question, you are combining like terms, meaning doing equations to numbers that fit with only each other.

<u>So we should start on the number without variables:</u>

23 and 27

<u>Match them up together and you should find your first equation:</u>

23 - 7

==> -4

So we should have  -4  +  8m  +  4n  -  5m

Now we should combine the numbers with the variable of m:

8m and 5m

<u>Match them up together and you should find your first equation:</u>

<u></u>

8m - 5m

==> 3m

So we should now have -4  + 3m  + 4n

<u></u>

<u>Since there are no other variables of n, we are all done:</u>

<u>-4  + 3m  + 4n  is  your  final  answer </u>

4 0
3 years ago
How many liters each of a 35% acid solution and a 80% acid solution must be used to produce 60 liters of a 65% acid solution? (R
serg [7]

Solving a system of equations we will see that we need to use <u>40 liters of the 80% acid solution</u>, and the other <u>20 liters are of the 35% acid solution</u>.

<h3>How many liters of each solution do we need to use?</h3>

First, we need to define the variables:

  • x = liters of the 35% acid used.
  • y = liters of the 80% acid used.

We know that we want to produce 60 liters of 65% acid, then we have the system of equations:

x + y = 60

x*0.35 + y*0.80 = 60*0.65

(in the second equation we wrote the percentages in decimal form).

To solve this we need to isolate one of the variables in one equation and then replace it in other one, isolating x we get:

x = 60 - y

Replacing that in the other equation:

(60 - y)*0.35 + y*0.80 = 60*0.65

y*(0.80 - 0.35) = 60*(0.65 - 0.35)

y*0.45 = 60*0.30

y = 60*0.30/0.45 = 40

So we need to use <u>40 liters of the 80% acid solution</u>, and the other <u>20 liters are of the 35% acid solution</u>.

If you want to learn more about systems of equations:

brainly.com/question/13729904

#SPJ1

7 0
1 year ago
Oliver downloaded 15 apps for her phone that altogether, used 2,806 MB of space. If each app used the same amount of space, abou
shepuryov [24]

Step-by-step explanation:

I guess the answer is 187MB

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2 years ago
What is the area of the figure
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I think it may be 80 km/h?
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