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Nataly [62]
3 years ago
12

Please Help!! I will give Brainliest to the correct answer!!

Mathematics
2 answers:
Likurg_2 [28]3 years ago
3 0

Answer:

84.5

Step-by-step explanation:

12.3(3)+11.9(4)=84.5

bazaltina [42]3 years ago
3 0

Answer:

87.5

Step-by-step explanation:

12.3 x 3= 39.9=s

11.9 x 4= 47.6=t

47.6 + 39.9= 87.5

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A rectangular garden must have a perimeter of 160 feet and an area of at least 1300 square feet. Describe the possible lengths o
Morgarella [4.7K]

Answer: The lengths of the garden are 57.32 feet and 22.68 feet (approximately)

Step-by-step explanation: The area has been given as 1300 which means,

Area = L x W

1300 = L x W ———(1)

Also the perimeter has been given as 160, hence we also have

Perimeter = 2(L + W)

160 = 2(L + W)

80 = L + W ———(2)

From equation (2), make L the subject of the equation

L = 80 - W

Substitute for the value of L into equation (1)

1300 = L x W

1300 = (80 - W) x W

1300 = 80W - W^2

Rearranging the equation we now have;

W^2 - 80W + 1300 = 0

Since we cannot factorize we shall apply the quadratic equation formula to solve for W. Please refer to the attachment for details of this.

Having calculated the value of W to be either 57.32 or 22.68, we can now find the value of L as follows;

Substitute for the value of W into equation (1)

1300 = L x W

1300 = L x 57.32

Divide both sides of the equation by 57.32

22.68 = L.

(Note that if we take the other value of W which is 22.68, the value of L shall be 57.32)

Since the area of the rectangular garden must be AT LEAST 1300 square feet we shall use the exact values for;

Length = 57.32 feet

Width = 22.68 feet

3 0
3 years ago
Read 2 more answers
Gloria talked on her cell phone for 320 minutes the first month,243 minutes the second month,and 489 minutes the third month.Her
34kurt

Answer: \$175

Step-by-step explanation:

Since Gloria cannot pay for each minute talked but for packages of 200 minutes at the rate of $25 each, we have to make calculations according to these conditions as follows:

Month 1:

Gloria talked on her cell phone for 320 min. So, she had to buy 2 packages of 200 min for \$25 each package.

Hence:

(\$25) 2= \$50

Month 2:

Gloria talked on her cell phone for 243 min. So, she had to buy again 2 packages of 200 min for \$25 each package.

Hence:

(\$25) 2= \$50

Month 3:

Gloria talked on her cell phone for 489 min. So, she had to buy 3 packages of 200 min for \$25 each package.

Hence:

(\$25) 3= \$75

Then, if we take the total Gloria had to pay for the frist three months, we have:

\$50 + \$50 + \$75= \$175

5 0
2 years ago
Given
kondaur [170]

Answer:

+ 10 and + 7

Step-by-step explanation:

Given

2x² + 7x + 5

Consider the factors of the product of the coefficient of the x² term and the constant term which sum to give the coefficient of the x- term.

product = 2 × 5 = + 10 and sum = + 7

4 0
3 years ago
5. In your part-lime job selling kitchen knives, you have two different sets available.
Korvikt [17]

Answer: 8.75

Step-by-step explanation:

575 divided by 3 equals 175. Divided by 20 equals 8.75. Probably rounds up to 9 but i dont know.

6 0
2 years ago
An 18 foot ladder touches a building 14 feet up the wall.
saw5 [17]
Check the picture below.

make sure your calculator is in Degree mode.

5 0
3 years ago
Read 2 more answers
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