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dexar [7]
3 years ago
7

Use the substitution method to solve the system of equations. 3x + y = 10 y = x – 2

Mathematics
1 answer:
Tatiana [17]3 years ago
8 0
<h3>Answer:</h3>

(x, y) = (3, 1)

<h3>Step-by-step explanation:</h3>

The given expression for y can be used in place of y in the first equation.

... 3x +(x -2) = 10

... 4x = 12 . . . . . add 2

... x = 3 . . . . . . . divide by 3

... y = 3 -2 = 1 . . use the second equation to find y


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If the perimeter of this quadrilateral (2ft 13ft 15in this is the quadrilateral) is 79 inches, what is the measure of the missin
kumpel [21]

Answer:

The missing side length is 27 in

Step-by-step explanation:

see the attached figure

we know that

1 ft= 12 in

step 1

Convert ft to in

2 ft=2*12=24 in

Note ----> the given measure is 13 in instead of 13 ft

step 2

Find the missing side length

The perimeter of a quadrilateral is the sum of its four side lengths

Let

x------> the missing side length

P=x+24+13+15

P=79 in

so

79=x+24+13+15

x=79-52=27 in

The missing side length is 27 in

7 0
4 years ago
The radius of a right circular cone is increasing at a rate of 2 inches per second and its height is decreasing at a rate of 2 i
sergey [27]
V=(1/3)πr²h
∴ dV/dt
=(π/3)[r²(dh/dt)+h2r(dr/dt)]
=(π/3)[(30)²(-2)+40(2)(30)(2)]
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Answer: 1600π in³/sec
5 0
3 years ago
The quotient of 14 and 7
stepladder [879]
2 is the answer as ‘quotient’ means the number divided by the other number.
8 0
3 years ago
Read 2 more answers
What's 7|–4| + 4|–1|?
choli [55]

Answer:

32

may be wrong im sorry... but im pretttyyyy sure its right lol

again if not im rlly sorry

Step-by-step explanation:

5 0
3 years ago
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jasenka [17]

Answer:

x< -7 ; x\geq9

Step-by-step explanation:

You start noticing that for x = 9 g(x) =0, and for x= -7 the function isn't defined.

That splits the number lines in 3 areas: x<-7; -7<x<9, and x>9. (notice the strict inequalities since we already discussed the breaking points.

Let's try a point in each interval, namely, since i like the values, -10, 0, 10.

g(-10) = \frac{-10-9}{-10+7} =\frac{-19}{-3} >0\\g(0) = \frac{0-9}{0+7}=-\frac{9}{7} 0

We have all the informations we need. The value we need are x< -7 ; x\geq9

3 0
3 years ago
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