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lbvjy [14]
3 years ago
8

5-91. A triangle with two side lengths 12 and 24 and one angle of 30 degrees between the two side lengths.Find the area of the t

riangle at right. Show all work.
Mathematics
1 answer:
Fed [463]3 years ago
8 0

Answer:

  72 square units

Step-by-step explanation:

The area is given by the formula ...

  A = 1/2ab·sin(C)

  A = 1/2(12)(24)sin(30°) = 1/2(12)(24)(1/2) = 72 . . . square units

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Ashley had a summer lemonade stand where she’s so small cups of lemonade for 1.25 and large cups for 2.50. If Ashley sold a tota
fredd [130]

Ashley sold 98 small cups of lemonade and 57 large cups of lemonade

<h3><u>Solution:</u></h3>

Let "x" be the number of small cups sold

Let "y" be the number of large cups sold

Cost of 1 small cup = $ 1.25

Cost of 1 large cup = $ 2.50

<em><u>Given that she sold a total 155 cups</u></em>

Therefore, we get,

x + y = 155 ------ eqn 1

<em><u>She sold the cups for $ 265</u></em>

Therefore, we can frame a equation as,

number of small cups sold x Cost of 1 small cup + number of large cups sold  x Cost of 1 large cup = 265

x \times 1.25 + y \times 2.50 = 265

1.25x + 2.5y = 265 ----- eqn 2

<em><u>Let us solve eqn 1 and eqn 2</u></em>

Divide eqn 2 by 1.25

x + 2y = 212 ------ eqn 3

<em><u>Subtract eqn 1 from eqn 3</u></em>

x + 2y - x - y = 212 - 155

<h3>y = 57</h3>

<em><u>Substitute y = 57 in eqn 1</u></em>

x + 57 = 155

x = 155 - 57

<h3>x = 98</h3>

Thus Ashley sold 98 small cups of lemonade and 57 large cups of lemonade

3 0
3 years ago
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Akimi4 [234]
What's the question..???
4 0
3 years ago
The perimeter of a rectangle is 30 cm. The height is 5 cm . what is the area of that rectangle.​
poizon [28]

Answer:

Pretty sure its 50

Step-by-step explanation:

if the height is 5, that would be multiplied by 2 because there are two identical sides. From the product, 10, you would need to get to 30, so you add 20. that means the other two identical sides are 10cm. 10x5 (length x width) is equal to 50.

7 0
3 years ago
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A study found that 23% of the cars manufactured last year were SUVs, 13% of the cars manufactured were white, and 2% of the cars
Katena32 [7]
I got 15% as my answer (:
7 0
3 years ago
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Chen completed the division problem below.
Lelechka [254]

Answer:

The error is:

He multiplied the dividend by 100 instead of 10

Step-by-step explanation:

∵ 1.926 ÷ 0.9 ⇒ means

  1.926 = 1926/1000 ⇒ dividend

  0.9 = 9/10 ⇒ divisor

* \frac{1926}{1000} ÷ \frac{9}{10}

 \frac{1926}{1000} × \frac{10}{9}

 \frac{1926}{100} × \frac{1}{9}

∵ 1926/100 = 19.26 ⇒ dividend

∴ 19.26 ÷ 9 = 1926/100 ÷ 9

  19 ÷ 9 = 2 with remainder 1/9

  12 ÷ 9 = 1 with remainder 3/9

  36 ÷ 9 = 4 no remainder

∴ The quotient is 214/100 = 2.14

7 0
3 years ago
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