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Dafna11 [192]
3 years ago
14

Use the elimination method to solve the system of equations. Choose the correct ordered pair. 

Mathematics
2 answers:
Aleonysh [2.5K]3 years ago
6 0
4x + 7y = 60
-4x + 7y = -4
------------------add
14y = 56
y = 56/14
y = 4

4x + 7y = 60
4x + 7(4) = 60
4x + 28 = 60
4x = 60 - 28
4x = 32
x = 32/4
x = 8

so ur solution is : (8,4)
elena-14-01-66 [18.8K]3 years ago
5 0
<h2>Answer: (8,4)</h2>

Still the right anser on APEX as of 4/29/19.

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Add<br>3×+8y-12zand5x-7y+15z<br>help meee<br>​
inn [45]

3x+5x+12z+15z+8y+7y

8x+17z+15y

4 0
2 years ago
A factory adds three red drops and two blue drops of coloring to white paint to make each pint purple The factory will make 50 g
Radda [10]

30 gallons of red paint  &  20 gallons of blue paint

Step-by-step explanation:

The ratio of red to blue paint drops to make purple paint is 3 : 2

Therefore the total number of gallon, in this case, fifty (50) is equivalent to the total of two ratios (which is 3 + 2 5)

If 5 in the ratio = 50; what about 2  & 3

5 = 50

2 = x

After cross multiplication;

5x = 50 * 2

X = 100/5

X = 20

The same for ratio 3

5 = 50

3 = y

5y = 50 * 3

y = 150/5

y = 30

The answer is therefore; 30 gallons of red paint to 20 gallons of blue paint

Learn More:

For more on ratios check out;

brainly.com/question/11662922

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7 0
3 years ago
Fine the value of 3x-2 when x=4
mamaluj [8]

Answer:

10

Step-by-step explanation:

3x - 2 = 3(4) - 2 = 12 - 2 = 10

8 0
2 years ago
Read 2 more answers
If the 7th of an AP is equal to 11 times the 11th term, find the 18th term
Zina [86]

Answer:

-33 or 33

Step-by-step explanation:

The seventh term of an AP is written as:

a + 6d

The eleventh term of an AP is written as:

a + 10d

If the 7th term is 11 times the 11th term, then;

a + 6d = 11(a + 10d)

Expand to get:

a + 6d = 11a + 110d

11a - a = 6d - 110d

10a =  - 104d

\frac{a}{d}  = -   \frac{104}{10}

\frac{a}{d}  = -   \frac{52}{5}

We must have a=-52 and d=5

Or

a=52 and d=-5

For the first case, the 18th term is :

- 52 + 5 \times 17 = 33

For the second case,

52 - 5 \times17 =  - 33

3 0
3 years ago
Type the correct answer in the box. Use numerals instead of words.
lyudmila [28]

Answer:

-2, 6

Step-by-step explanation:

(x - 6)(x + 2) = 0

x - 6 = 0     x+ 2 = 0

  x = 6           x = -2  

The values of x that would result in the given expression being equal to 0, in order from least to greatest, are -2 and 6.

7 0
3 years ago
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