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SCORPION-xisa [38]
4 years ago
14

25x+10y=24 X+y=20 ? I don't know how to solve systems of equations

Mathematics
1 answer:
Oksanka [162]4 years ago
7 0
So you have
25x+10y=24
and
x+y=20
you can eith er subsitue or add
let's add
mutliply x+y=10 by -10
-10x-10y=-200
add to first equation
25x+10y=24
<u>-10x-10y=-200 +
</u>15x+0y=-176
15x=-176
divide both sides by 15
x=-176/15
subsitue
x+y=20
-176/15+y=20
add -176/15 to both sides
y=476/15

solution
(x,y)
(\frac{-176}{15}, \frac{476}{15}

<u />
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Circle A has a radius of 17 inches. what is the circumstance of Circle A
Rasek [7]

Answer:

106.76

Step-by-step explanation:

The formula to calculate the circumference if you know the radius is as follows: Circumference = 2 x Radius x π π = Pi = 3.14, thus, the math to calculate the circumference of a circle with a radius of 17 is: 2 x 17 x 3.14 = 106.76

3 0
2 years ago
Charlotte purchased a pool for $7680 using a six-month deferred payment plan with an interest rate of 20.45%. She did not make a
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6 0
3 years ago
Which of the following choices translates the sentence “the difference of three times a number and 20 is 13”?
evablogger [386]

Answer:

3x - 20 = 13

Step-by-step explanation:

1. The word is signals the equal sign.

The difference of three times a number and 20 = 13

2. The word difference signals subtraction.

3. The phrase a number sigals that the number is unknown, so a variable should be used. In this case, I'll use x.

4. Three times that number = 3x.

The difference = subtraction.

3x-20=13

8 0
4 years ago
Read 2 more answers
If f(x)= x+2<br>g(x)=x+1<br>find gof(x)​
ohaa [14]

Answer:

gof(x) = 3

Step-by-step explanation:

Given that,

f(x) = x+2 and g(x) = x+1

We need to find gof(x).

gof(x) means g[f(x)].

g[f(x)] = g(x +2)

= x+2+1

= x+3

Hence, the value of gof(x) is 3.

6 0
3 years ago
Please help me figure this out​
polet [3.4K]

Answer:3⁴ and 81¹

Step-by-step explanation:

3⁹= 19683

3⁴= 81

-9²= -81

9⁹= 387,420,489

81¹= 81

8 0
4 years ago
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