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Rudiy27
3 years ago
5

If a watch costs $40 and you must pay 7.5%sales tax , how much will the tax be?

Mathematics
1 answer:
Vladimir [108]3 years ago
6 0
The answer would be $2.82

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I got 2 questions.
alexandr402 [8]

Answer:

1. In triangle ABC,

AC = a = 10, BC =b= 7 and ∠ C = 90°

By cosine law,

AB^2 = 7^2 + 10^2 - 2\times 7\times 10 cos 90^{\circ}

AB^2 = 49 + 100 - 0

AB^2 = 149

AB= \sqrt{149}

Now, by the law of sine,

\frac{sin B}{10} = \frac{sin90^{\circ}}{\sqrt{149} }

sin B = \frac{10}{\sqrt{149} }

\angle B = 55.0079798014\approx 55.008^{\circ}

2. In triangle ABC,

∠B = 30°,  AB=c=10 and ∠C = 90°

∠A = 180°-(30+90)°=60°

\frac{AC}{10}=sin30^{\circ}

⇒ AC = \frac{10}{2} = 5

By Pythagoras,

CB^2 = AB^2 - AC^2=10^2 - 5^2 = 100 - 25 = 75

⇒ CB = \sqrt{75} =8.66025403784\approx 8.66



6 0
3 years ago
Read 2 more answers
Find the sum of all interior angles of a polygon with 9​
marin [14]

Answer:

1260

Step-by-step explanation:

polygon having sides is 9

so sum will be 1260

7 0
3 years ago
Least common multiple of 35 and 70
Andreas93 [3]

Answer:

70

Step-by-step explanation:

3 0
2 years ago
Read 2 more answers
Anyone know the answer??
Jobisdone [24]
A..Just plus it if not wrong
8 0
3 years ago
In a fruit cocktail, for every 15 ml of orange juice you need 25 ml of apple juice and 10 ml of coconut milk. What proportion of
zysi [14]

Answer:

the answer is  

Step-by-step explanation:

The proportion of coconut milk in the cocktail is  ml for every 15 ml of orange juice.

Proportion shows the fractional composition of a given quantity or substance.

So that:

orange juice = 15 ml

contents of the orange juice;

apple juice = 25 ml

coconut milk = 10 ml

total              = 35 ml

So that;

the fraction of apple juice in the orange juice =  x 15

                                          =

the fraction of apple juice in the orange juice =  ml

Also,

the fraction of coconut juice in the orange juice =  x 15

                                        =

the fraction of coconut juice in the orange juice =  ml

Therefore, the proportion of the cocktail that is coconut milk is: for every 15 ml of orange juice, then  ml of coconut juice is required.

3 0
2 years ago
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