3 years ago

How to be good at math???

Mathematics

1 answer:

nexus9112 [7]3 years ago

4 0

Step-by-step explanation:

Do more and more practice daily

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Romeo paid $380.75 in car repairs. The sales Tax rate is 7.5% . Which of the following is a responsible estimate for the total R

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Answer: $380.75x0.075=28.55625

28.55625+380.75=409.30625

$409.30625~$409.31

Answer: $409.31

Step-by-step explanation:

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Yes

Step-by-step explanation:

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3 years ago

What is the approximate value of b, rounded to the nearest tenth? Use the law of sines to find the answer. Triangle A B C is sho

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Answer:

4.7 units

Step-by-step explanation:

We are given that in triangle ABC

AB= 3 units

Angle ABC=76 degree

Angle CAB=66 degrees

AC=b

We have to find the approximate value of b using sin laws.

We know that sum of angles of a triangle =180 degrees

$\angle CAB+\angle ABC+\angle ACB=180$

$76+66+\angle ACB=180$

$142+\angle ACB=180$

$\angle ACB=180-142=38^{\circ}$

We know that law of sines

$\frac{BC}{Sin A}=\frac{AC}{SinB}=\frac{AB}{sin C}$

Substitute the values then we get

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$b=\frac{3}{sin 38^{\circ}}\times sin 76^{\circ}$

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Solve for x. 5 = 1/5x -3

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Step-by-step explanation:

5=1/5x-3

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How to be good at math??? ​

How to be good at math???