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3 years ago

Marissa is painting her rectangular patio, with the exception of a bench that does not need to be painted:

Mathematics

2 answers:

kari74 [83]3 years ago

8 0

Answer:

A = (x + 25)(x + 15) − 30

Step-by-step explanation:

Area of the patio:

Sp = lw
l = x +25
w = x + 15
S = (x + 25)(x + 15)

Area of bench:

Sb= lw = 10*3 = 30

Area A to be painted is the area of patio minus area of bench:

A = (x + 25)(x + 15) - 30

So the last choice is the correct one.

Alenkinab [10]3 years ago

5 0

Answer:

A = (x + 18)(x + 35)

Step-by-step explanation:

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Which of the following is the interest on $6000 at 6% compounded semiannually for eight years?

ryzh [129]

Answer:

$3628.24

Step-by-step explanation:

we use the formula for accrued value (A) with compounded interest:

$A=P(1+\frac{r}{n})^{n*t}$

where A= accrued value (principal plus the accumulated interest)

P = principal -> in our case $6000

r = annual interest rate (in decimal form) -> in our case 0.06

n = number of compoundings per year. In our case 2 (semiannually)

t = time in years -> in our case 8

$A=P(1+\frac{r}{n})^{n*t}\\A = 6000(1+\frac{0.06}{2})^{16}\\ A= 6000(1+0.03)^{16}\\A = $9628.24$

Since this is the value of principal plus accumulated interest, we subtract from it the principal ($6000) to get the value of just the interest:

$9628.24 - $6000 = $3628.24

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3 years ago

A teacher weighed 145 lbs in 1986 and weighs 190 lbs in 2007. What is the rate of change in weight? HELP

marishachu [46]

Answer:

Step-by-step explanation:

she gained 45 pounds which is 15/7 of 145

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3 years ago

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Kim has a $10 bill, a $20 bill, and 2 $5 gift certificates. she uses the gift certificates toward the purchase of a cd for $14.0

uysha [10]

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4 years ago

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blsea [12.9K]

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3 years ago

PLEASE HELP WILL GIVE BRAINLIEST Abby purchased 4 2/5 gallons of paint to paint 4 walls of a room in her house. the cost of one

natima [27]

Answer:

Cost to paint 4 walls of a room = $24.20

Cost of painting 3 walls of a room =$18.15

Step-by-step explanation:

(a) Abby purchased 4 2/5 gallons of paint to paint 4 walls of a room in her house.

$4\frac{2}{5}gallons \ of \ paint = \frac{4*5+2}{5} =\frac{22}{5}$

1 gallon cost = 5.50

So 22/5 gallons cost = $\frac{22}{5} * 5.5= 24.20$

Cost to paint 4 walls of a room = $24.20

(b)cost of painting 4 walls of a room = $24.20

cost of painting 1 wall of a room = $\frac{24.20}{4} =6.05$

Cost of painting 3 walls of a room = 6.05 * 3= $18.15

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3 years ago