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dimulka [17.4K]
2 years ago
15

How many solutions does the following equation have? 7(y+3)=5y+8 A No solutions B Exactly one solution C Infinitely many solutio

ns
Mathematics
2 answers:
pickupchik [31]2 years ago
8 0

Answer:

Answer is B

Step-by-step explanation:

7y+21=5y+8

2y=-13

y= -6.5

iragen [17]2 years ago
3 0

Answer:

C

Step-by-step explanation:

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Need help on this!!!!
Alexxandr [17]

Answer:

  • (a)  area = 3y^2 +14y +16
  • (b)  perimeter = 8y +20

Step-by-step explanation:

Part of the point of Algebra is that you can work with things that stand for numbers (almost) as easily as working with numbers themselves. Here, you are given values that stand for the length and width of the rectangle.

(a) You know the area of a rectangle is found by multiplying its length by its width. The same is true when length and width are algebraic expressions that stand for those numbers.

  <u>Given:</u> length = 3y+8, width = y+2

  <u>Find:</u> area = length × width

  <u>Solution:</u>

     area = (3y+8) × (y+2)

Using the distributive property, we can perform this multiplication in essentially the same way we would for the numbers 38 and 12.

     area = 3y(y +2) +8(y +2)           equivalent to 30(12) +8(12)

     = 3y^2 +6y +8y +16                  equivalent to 30·10 +30·2 +8·10 +8·2

     area = 3y^2 +14y +16              equivalent to 3·10^2 +14·10 +16

(Of course, with numbers, there are relationships between units and tens and hundreds that let us further combine terms. When variables are involved, we can combine terms with the same power of the variable, but we cannot combine "y" terms with "y^2" terms the way we can with numbers.)

___

(b) The perimeter is the sum of the lengths of the four sides of the rectangle. Since two of those sides are "length" and two are "width", we can write ...

  perimeter = 2(length + width)

Making the substitution for length and width as defined above, we have

  perimeter = 2((3y+8) + (y+2))

  = 2(3y+y + 8+2) = 2(4y +10)

  perimeter = 8y +20

5 0
3 years ago
Bagaimana cara membuktikan bahwa persamaan garis tegak lurus itu benar
Tems11 [23]
Ketika dua garis tegak lurus, kemiringan satu adalah timbal balik negatif dari yang lain.Jika kemiringan satu baris adalah m, kemiringan yang lain adalahCoba ini Drag poin C atau D. Catatan lereng ketika garis tegak lurus satu sama lain.
Ketika dua garis tegak lurus satu sama lain (di sudut kanan atau 90 °), lereng mereka memiliki hubungan khusus satu sama lain. Jika kemiringan satu baris adalah m maka kemiringan garis lainnya adalah timbal balik negatif m. 
7 0
3 years ago
Karen has 7 over 8cup of ice cream. How many 1 over 3cup servings can she make?
STALIN [3.7K]

Answer:

<em>1 and 5 over 24</em>

Step-by-step explanation:

its right trust me because 1+1 is 3

8 0
2 years ago
Solve −4(x + 10) − 6 = −3(x − 2).<br> A.−40 B.−46 C.−52 D.52
m_a_m_a [10]
The answer is -52 so it would be C
8 0
3 years ago
Read 2 more answers
Naomi receives a base weekly salary of $225 plus a commission of $50 for each cable service
Aleks [24]

Answer:

$40.50 will be taken out in taxes.

Step-by-step explanation:

First, solve for how much Naomi will receive in a paycheck:

$225 + $50(9)

$225 + $450

$675

Now, solve for 6% tax:

$675 × 0.06

$40.50

5 0
2 years ago
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