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2 years ago

Simplify 7y+7-8(y-7)

Mathematics

2 answers:

Salsk061 [2.6K]2 years ago

8 0

Answer:

-y + 63

Step-by-step explanation:

Let's start like by solving the order of operations, and then add our Y's:

7y + 7 + −8y + 56

Adding:

+63 - y

Simplifying:

-y + 63

Thus, our answer is -y + 63

Alex787 [66]2 years ago

5 0

Answer:

-y+63

Step-by-step explanation:

You need to distribute the -8 by multiplying it to y and -7 therefore making 7y+7-y+56. Then you subtract 7y by 8y and then add 7 with 56

As a result, you then get -y + 63

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Which value can be added to the set below without changing its mean?

shusha [124]

Answer:

15..

Step-by-step explanation:

4, 10, 14, 18, 22, 22

Mean = (4 + 10 + 14 + 18 + 22 + 22)/6

= 90/6

= 15.

Number to be added, 'y'

For the mean to be the same

(90 + y) / 7 = 15

90 + y = 15 × 7

90 + y = 105

y = 105 - 90

= 15

7 0

3 years ago

Please help due in 20 minutes!!

Nikitich [7]

Answer:

length is 15.5 and the width is 12.5

Step-by-step explanation:

Length rectangle = 3cm. longer than its width.

Rectangle perimeter = 56 cm.

find its dimensions?

P = 2L +2w

L= w + 3

P= 56

P = 2L +2w

56 = 2(w+3) +2(w)

56 = 2w +6 + 2w

4w= 56 - 6

4w = 50

w = 50/4

w = 12.5

L= 12.5 +3 = 15.5

L= 15.5

Solution:

Length= 15.5 cm

Width = 12.5 cm

i know it looks complex but i hope this helps :)

7 0

3 years ago

Read 2 more answers

Simplify the expression -2x^2(4x − 3). -8x3 − 6x2 -8x3 + 6x2 8x3 − 6x2 8x3 + 6x2

Digiron [165]

To simplify the expression we are going to use the distributive property of multiplication: $a(b+c)=ab+ac$ .
We can infer from our problem that $a=-2x^2$ , $b=4x$ , and $c=-3$ . So lets apply the property to simplify our expression:
$-2x^2(4x-3)=(-2x^2)(4x)+(-2x^2)(-3)$
$(-2x^2)(4x)+(-2x^2)(-3)=-8x^3+6x^2$

We can conclude that the correct answer is -8x3 + 6x2

8 0

3 years ago

What is the product?

xxMikexx [17]

Answer:

${ \tt{(5r - 4)( {r}^{2} - 6r + 4) }} \\ = { \tt{( {5r}^{3} - {30r}^{2} + 20r - 4 {r}^{2} + 24r - 16) }} \\ = { \tt{ {5r}^{3} - 34 {r}^{2} + 44r - 16 }}$