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Zolol [24]
3 years ago
10

-4x +7y=26;4x+7y=2pls help​

Mathematics
1 answer:
Elis [28]3 years ago
7 0

Answer: -4x +7y=26

4x +7y=2

=. 0+ 14x=28

X= 2. Plug x in. Y =. 4(2) +7y= 2. = 8+7y=2. 7y=2-8 7y=-6 y=-6/7

Step-by-step explanation:

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How can you move just one number to a different
alexandr1967 [171]

Answer:

Remove 9 from triangle B to A

Step-by-step explanation:

Given

Three Triangles

A: 1,2,3

B: 7,8,9

C: 4,5,6

Required

Make their sum equal

First, we need to calculate the sum in each triangles;

A = 1 + 2 + 3

A = 6

B = 7 + 8 + 9

B = 24

C = 4 + 5 + 6

C = 15

Remove 9 from triangle B to A

A = 6 + 9

A = 15

B = 24 - 9

B = 15

At this point, we have:

A = 15     B = 15     C = 15

<em>Hence, the solution is to remove 9 from B to A</em>

6 0
3 years ago
Find y when x = 9 if y varies directly as the square of x, and y = 245 when x = 7.
Lera25 [3.4K]

Step-by-step explanation:

y is directly proportional to x^2.

This means that y = kx^2, where k is a real constant.

When x = 7, y = 245:

245 = k(7)^2 = 49k. By division, k = 5.

Now we know that y = 5x^2, when x = 9, y = 5(9)^2 = 5 * 81 = 405.

5 0
3 years ago
PLEASE HELP!
Mkey [24]
14.76 is your answer you just multiply .18 to 82 and get your answer
8 0
3 years ago
Read 2 more answers
A.) 5<br> B.) 6<br> C.) 7<br> D.) 8
Amiraneli [1.4K]

Answer:

C. 7

Step-by-step explanation:

First you have to find the unit rate of this equation

The unit rate is 20 students for every 1 teacher because 40 divided by 2 is 20

so if you do 140 divided by 20 your answer is 7

there are 7 teachers

7 0
3 years ago
Given sets X, Y, Z, and U, find the set Xn(X - Y) using the listing method.
Aliun [14]

Answer:

{f, a}

Step-by-step explanation:

Given the sets:

X = {d, c, f, a}

Y = {d, e, c}

Z ={e, c, b, f, g}

U = {a, b, c, d, e, f, g}

To obtain the set X n (X - Y)

We first obtain :

(X - Y) :

The elements in X that are not in Y

(X - Y) = {f, a}

X n (X - Y) :

X = {d, c, f, a} intersection

(X - Y) = {f, a}

X n (X - Y) = elements in X and (X - Y)

X n (X - Y) = {f, a}

6 0
3 years ago
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