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Anton [14]
3 years ago
7

Could someone help me please ?

Mathematics
1 answer:
jeyben [28]3 years ago
5 0

Answer: 12.66

Step-by-step explanation:

Use pytagoras to find CB

AB= 6 cm

CA=12 cm

CB²=CA²-AB²

CB²=12²-6²

CB²=144-36

CB=√108

CB=6√3

Using formula for sinα=CB/CD

α=55°

sin55°=6√3/CD

CD=6√3/sin55°

CD= 6*1.73/0.82=10.38/0.82=12.66

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Express the following ratios as fractions in their lowest term
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1/4 is A and 1/20 is B

Step-by-step explanation:

Not much of an explanation needed

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Your mother gave you $13.32 with which to buy a present. This covered 3/5 of the cost. How much did the present cost
Gala2k [10]

Answer:

$22.20

Step-by-step explanation:

We are told that $13.32 only covered 3/5 of the cost. Does this mean it covered the whole cost? No. The 5 in the denominator represents the whole cost, and the 3 represents the fraction of the cost. In this case, 13.32 represents the 3, as it did not cover the whole cost.

Let's set up our equation by making 13.32 into a fraction.

13.32/x

We will represent the present's actual cost with the letter x.

13.32/x = 3/5

We want to make sure the 13.32 is in the numerator, equal to the 3 in the numerator in the 3/5 number, because we know that $13.32 only covered for a <em>fraction </em>of the present's cost, not the whole cost.

We solve this by doing cross multiplication. Multiply the 13.32 by the 5.

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Next we divide 66.6 by 3 to get 22.2

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This gives us our final answer of $22.20. This means that the cost of the original present was $22.20

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The temperature started at 87*F . If the temperature wen down 10*F and up 17*F, whats is the temperature?
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The steps to solving the expression the quantity of the sum of four squared plus six divided by the absolute value of negative 0
geniusboy [140]

The missing Steps 4 and step 6 are respectively; 4) 22 divided by 0.25 − 12.6 ÷ 6 and 6) 88 - 2.1

<h3>How to use order of operations?</h3>

We want to find the sum of four squared plus six divided by the absolute value of negative 0.25 − 12.6 ÷ 6.

The steps are;

1) the quantity of the sum of four squared plus six divided by the absolute value of negative 0.25 − 12.6 ÷ 6

2) the quantity of the sum of four squared plus six divided by 0.25 − 12.6 ÷ 6

3) the quantity of the sum of 16 plus six divided by 0.25 − 12.6 ÷ 6

4) 22 divided by 0.25 − 12.6 ÷ 6

5) 88 − 12.6 ÷ 6

6) 88 - 2.1

Read more about Order of Operations at; brainly.com/question/27529825

#SPJ1

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