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Mars2501 [29]
3 years ago
15

Which system of equations is equivalent to the following system? (5 points) 2x + 4y = 14 4x + y = 20

Mathematics
1 answer:
fredd [130]3 years ago
3 0

Answer:

a.

Step-by-step explanation:

4x+y=20 multiplied by (-4) gives you -16x-4y=-80

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What is the value of x in the equation 0.2(x + 1) + 0.5x = –0.3(x – 4)
almond37 [142]
0.2x+0.2+0.5x=-0.3x+1.2
0.7x+0.3x=1.2-0.2
x=1
That's your answer.
8 0
4 years ago
Read 2 more answers
Which set of numbers may represent the lengths of the sides of a triangle? (A) {2,5,9} (B) {6,6,7} (C) {6,4,2} (D) {7,8,1}
Olin [163]

Answer:

B {6, 6, 7}

Step-by-step explanation:

Which set of numbers may represent the lengths of the sides of a triangle? (A) {2,5,9} (B) {6,6,7} (C) {6,4,2} (D) {7,8,1}

For a given triangle with 3 sides, the sun of the length of any two sides must be greater Than the third side. This can be expressed mathematically as;

Let the side be ;

x, y and z

Then:

x > (y + z) or

y > (x + z) or

z > (x + y)

For A{2,5,9}

(2 + 5) < 9 (does not meet criteria)

For B {6,6,7}

(6 +6) > 7

(7 +6) > 6

Meets all criteria

For C {6,4,2}

(4 +2) is not greater Than 6 (does not meet criteria)

For D {7,8,1}

(7 +1) is not greater Than 8 ( does not meet criteria)

3 0
3 years ago
HELP RIGHT NOW <br> What is the value of x? Enter your answer in the box
Svet_ta [14]

180-55-80=45

so it is 45 degree because triangle sun of all the angle is 180

6 0
3 years ago
Given f(x) and g(x) = k⋅f(x), use the graph to determine the value of k.
oksian1 [2.3K]

Answer:

-3 is the value of k in g(x)=kf(x)

Step-by-step explanation:

Both functions cross nicely at x=-3 so I'm going to plug in -3 for x:

g(x)=kf(x)

g(-3)=kf(-3)

To solve this for k we will need to find the values for both g(-3) and f(-3).

g(-3) means we want the y that corresponds to x=-3 on the curve/line of g.

g(-3)=-3

f(-3) means we want the y that corresponds to x=-3 on the curve/line of f.

f(-3)=1

So our equation becomes:

g(-3)=kf(-3)

-3=k(1)

-3=k

So k=-3.

8 0
3 years ago
Which equation represents a direct variation? What is the constant of variation?
V125BC [204]

The answer is C


The constant is -3

7 0
3 years ago
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