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2 years ago

An item is regularly placed at $87. Laura bought it on sale for 55% off the regular price. How much did Laura pay?

Mathematics

2 answers:

Sholpan [36]2 years ago

8 0

Answer:

$39.15

Step-by-step explanation:

87 x .55 = 47.85

87-47.85= 39.15

Sergio039 [100]2 years ago

4 0

Answer:

$39.15

Step-by-step explanation:

87 x 55%

87 x 0.55 = 47.85

87 - 47.85 = 39.15

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sleet_krkn [62]

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2 years ago

Find the perimeter of the triangle to the nearest whole unit. 18. 16. 14. 12.

devlian [24]

Answer:

Step-by-step explanation:

Perimeter of the ∆ = sum of the length of the 3 sides.

The length of the 3 sides can be calculated by using the distance formula, $d = \sqrt{(x_2 - x_1)^2 + (y_2 - y_1)^2}$ , to find the distance between the vertices of the ∆.

The coordinates of the 3 vertices are:

(-1, 3), (2, 2), (-2, -2)

Distance between (-1, 3) and (2, 2):

Let,

$(-1, 3) = (x_1, y_1)$

$(2, 2) = (x_2, y_2)$

$d = \sqrt{(2 -(-1))^2 + (2 - 3)^2}$

$d = \sqrt{(3)^2 + (-1)^2}$

$d = \sqrt{9 + 1} = \sqrt{10} = 3.2 units$

Distance between (2, 2) and (-2, -2)

Let,

$(2, 2) = (x_1, y_1)$

$(-2, -2) = (x_2, y_2)$

$d = \sqrt{(-2 - 2)^2 + (-2 - 2)^2}$

$d = \sqrt{(-4)^2 + (-4)^2}$

$d = \sqrt{16 + 16} = \sqrt{32} = 5.7 units$

Distance between (-2, -2) and (-1, 3)

Let,

$(-2, -2) = (x_1, y_1)$

$(-1, 3) = (x_2, y_2)$

$d = \sqrt{(-1 -(-2))^2 + (3 -(-2))^2}$

$d = \sqrt{(1)^2 + (5)^2}$

$d = \sqrt{1 + 25} = \sqrt{26} = 5.1 units$

Perimeter of triangle = 3.2 + 5.7 + 5.1 = 14.0 units

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2 years ago

A book that normally sells for $25.50 is on sale at 15% off. What is the discount amount, and what is the books sales price

viktelen [127]

Answer:

1) $3.82 2) $21.68

Step-by-step explanation:

If it's 15% off, the price is 85% of the original price--- $25.50*85\% = 21.675 \approx 21.68$ , and this gives a difference from the original price and the new price of $25.50-21.68=3.82$ .

3 0

2 years ago

Find the perimeter of each figure

Sliva [168]

Answer:

66) P = 38m

67) P = 32.7m

Step-by-step explanation:

Perimeter of triangle

P = a + b + c

P = 8 + 16 + 14

P = 38m

Perimeter of trapezoid

P = a + b + c + d

P = 6.4 + 13.6 + 6 + 6.7

P = 32.7

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2 years ago