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dimulka [17.4K]
3 years ago
5

18 - 12y = -22 - 7y Can someone help

Mathematics
2 answers:
Ganezh [65]3 years ago
5 0

Answer:

8

Step-by-step explanation:

18 = -22 +5y

add 22 to both sides

40 = 5y

y = 8

Naddik [55]3 years ago
4 0

Answer:

y=8

Step-by-step explanation: Add 7y to both sides

18-12y+7y=-22

Then subtract 18 from both sides

-12y+7y=-22-18

Combine like terms

-5y=-40

Divide Both sides by -5

y=8

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9 inches of ribbon are needed for wrapping each present. How many presents can be wrapped with 6 yards of ribbon?
netineya [11]

Answer:

a total of 24 presents can be wrapped

Step-by-step explanation:

6 x 3 = 18 feet of ribbon

18 x 12 = 216 inches of ribbon

216/9 = 24 presents can be wrapped

3 0
3 years ago
Emma puts $1000 in a savings account that pays 4% interest, compounded monthly. How much money will be in the account 3 years la
lorasvet [3.4K]

Answer:

Option A. \$1,127.27  

Step-by-step explanation:

we know that    

The compound interest formula is equal to  

A=P(1+\frac{r}{n})^{nt}  

where  

A is the Final Investment Value  

P is the Principal amount of money to be invested  

r is the rate of interest  in decimal

t is Number of Time Periods  

n is the number of times interest is compounded per year

in this problem we have  

t=3\ years\\ P=\$1,000\\ r=0.04\\n=12  

substitute in the formula above  

A=\$1,000(1+\frac{0.04}{12})^{12*3}=\$1,127.27  

6 0
4 years ago
Read 2 more answers
A rectangle has a perimeter of 30 ft. Find a function that models its area A in terms of the length x of one of its sides. What
Vedmedyk [2.9K]

Answer:

Step-by-step explanation:

Let the other side of the rectangle be y. The perimeter of the rectangle is expressed as P = 2(x+y)

Given P = 30ft, on substituting P = 30 into the expression;

30 = 2(x+y)

x+y = 15

y = 15-x

Also since the area of the rectangle is xy;

A = xy

Substitute y = 15-x into the area;

A = x(15-x)

A = 15x-x²

The function that models its area A in terms of the length x of one of its sides is A = 15x-x²

The side of length x yields the greatest area when dA/dx = 0

dA/dx = 15-2x

15-2x = 0

-2x = -15

x = -15/-2

x = 7.5 ft

Hence the side length, x that yields the greatest area is 7.5ft.

Since y = 15-x

y = 15-7.5

y = 7.5

Area of the rectangle = 7.5*7.5

Area of the rectangle = 56.25ft²

6 0
3 years ago
The lowest common denominator for the fractions 8/64 and 8/32 is what
KiRa [710]

the least common denominator for 32 and 64 is

Answer: 64

3 0
4 years ago
The side lengths of a triangle are 5, 10, and 13. Is this a right triangle?
Zarrin [17]

Answer:

Step-by-step explanation:

5²+10²=25+100=125

13²=169

so 5²+10²≠13²

so it is not a right angled triangle.

5 0
3 years ago
Read 2 more answers
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