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riadik2000 [5.3K]
3 years ago
15

Solve the system of linear equations by substitution. Check your solution.

Mathematics
1 answer:
bearhunter [10]3 years ago
8 0
1. X+2=3x-4
6=2x
x= 3

2. y= 8-x
8-x = 3x+4
4= 4x
X= 1

3. -2x +3(2x+7)=9
-2x + 6x + 21 = 9
4x = -12
x= -3
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A marathon takes place each year.In 2020 there were 6500 runners.Does this predict that in 2023 there will be more than 7500 run
777dan777 [17]

Answer:

yes

there would be 7525 runners

Step-by-step explanation:

The formula for calculating future value:

FV = P (1 + r) n

FV = Future value  

P = Present value  

R = interest rate  

N = number of years  

6500 x (1.05)^3 = 7525 runners

5 0
3 years ago
Someone please help me
Nataly_w [17]

Answer:

In the picture.

Step-by-step explanation:

Note : From 1 to 12 it's the same idea but without variables (very easy) so , just do the same idea.

I solved the problems contained variables

I hope that it's a clear explanation.

8 0
3 years ago
4. Marcella has 4 fewer male cousins than female cousins. Let f represent the number of female cousins. Write an expression for
sladkih [1.3K]
F - 4 = number of boy cousins.
4 0
3 years ago
Please help! 50 POINTS!!!
expeople1 [14]

Answer:

f(x) = 2/3 x +3

Step-by-step explanation:

We know the y intercept ( where it crosses the y axis)  is 3


We can calculate the slope from 2 points (-3,1) and (0,3)

Slope = (y2-y1)/(x2-x1)

         = (3-1)/(0--3)

          = (3-1)/(0+3)

          = (2/3)

The slope is 2/3


Since we know the slope and the y intercept, we can use the slope intercept form

y= mx+b

y = 2/3 x+3

f(x) = 2/3 x +3

5 0
3 years ago
Read 2 more answers
I need help I don’t know this question
murzikaleks [220]
So singlehandedly, November has 25% of the total rain in one year of New York's, which is 62.51 inches.

So, November receives: *percentage* x *total*
= 25% x 62.51 = 15.6275 in

------------------------------------------------------------------------------------------------------
So, in November, New Yorks receives 25% of total rain in one year, which is 15.6275 inches.
------------------------------------------------------------------------------------------------------

I'd like my Brainliest pls ;W;
4 0
3 years ago
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