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Svetradugi [14.3K]
3 years ago
5

Find the following difference by changing into sums with multiplication by a negative number.

Mathematics
1 answer:
Ahat [919]3 years ago
4 0
2(3x+7) it is the correct answer
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WHOEVER GIVES RIGHT ANSWER GET 99 POINTS
Free_Kalibri [48]

The correct answer is

y-4= 5(x--2)

y-4=5(x+2)

y-4= 5x+10

y= 5x+10+4

y=5x+14

3 0
3 years ago
Read 2 more answers
Solve each pair of simultaneous equations giving both solutions. You need to multiply both equations by suitable numbers before
Vladimir79 [104]

Answer:

a) x = 12  y = 9

b) x = -2   y = -4

c) x = 6   y = -2

Step-by-step explanation:

a)

Equation 1:  6x - 7y = 9

Equation 2:  3x + 2y = 54

Multiply Equation 2 by 2:

⇒ 6x + 4y = 108

Subtract equations:

   6x + 4y = 108

<u>-    6x - 7y = 9      </u>

           11y = 99

Divide both sides by 11:

⇒ y = 9

Substitute found value of y into Equation 1 and solve for x:

⇒ 6x - 7(9) = 9

⇒ 6x - 63 = 9

⇒ 6x = 72

⇒ x = 12

---------------------------------------------------------------------------------------------------

b)

Equation 1:  4x - 5y = 12

Equation 2:  2x - 3y = 8

Multiply Equation 2 by 2:

⇒ 4x - 6y = 16

Subtract equations:

   4x - 6y = 16

<u>-   4x - 5y = 12      </u>

           -y = 4

Divide both sides by -1:

⇒ y = -4

Substitute found value of y into Equation 1 and solve for x:

⇒ 4x - 5(-4) = 12

⇒ 4x + 20 = 12

⇒ 4x = -8

⇒ x = -2

---------------------------------------------------------------------------------------------------

c)

Equation 1:  4x - 2y = 28

Equation 2:  3x + 3y = 12

Multiply Equation 1 by 3:

⇒ 12x - 6y = 84

Multiply Equation 2 by 4:

⇒ 12x + 12y = 48

Subtract equations:

     12x - 6y = 84

<u>-   12x + 12y = 48   </u>

            -18y = 36

Divide both sides by -18:

⇒ y = -2

Substitute found value of y into Equation 1 and solve for x:

⇒ 4x - 2(-2) = 28

⇒ 4x + 4 = 28

⇒ 4x = 24

⇒ x = 6

6 0
2 years ago
2. There are 1800 students enrolled at Springfield College, and 65% of them are female.
Kamila [148]

Answer:

a) 1170

b) 35%

c) 630

Step-by-step explanation:

6 0
3 years ago
90000 1000 + 7000 + 7 =​
STatiana [176]

Answer:

900,008,007

Step-by-step explanation:

first add 90000,1000 +7000=900,008,000

then add 7 with 900,008,000

Answer =900,008,007

6 0
2 years ago
Read 2 more answers
company 2 charges 4600$ for the first 550 feet of fence and 29 for each additional feet.find the cost if company 2 completes the
Maru [420]

Answer:

I love you 6.78

Step-by-step explanation:

You have to love yourself

- 5x

-6 x 45

6.78

4 0
3 years ago
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