Mr. Pham wrote the equation below on the board.

Mathematics

2 answers:

Zielflug [23.3K]3 years ago

8 0

Answer:

5.5

Step-by-step explanation:

Given:

18 -7x = -20.5

We can find x by subtracting 18, then dividing by the coefficient of x. (This is known as a 2-step equation.)

-7x = -38.5 . . . . . subtract 18 from both sides

x = -38.5/-7 = 5.5 . . . . .divide by -7

The value of x is 5.5.

nikitadnepr [17]3 years ago

8 0

Answer:

5 1/2

Step-by-step explanation:

If you know simple math you will be able to calculate this. This person is right. Those of you looking for a fractional answer can simply convert 5.5 into a fraction. 5.5 = 5 1/2. don't give people bad ratings b/c of this.

5.5 is also the answer!

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In △ABC, m∠A=19°, a=13, and b=14. Find c to the nearest tenth.

34kurt

We know that
Applying the law of sines

step 1
Find the value of angle B
a=13
b=14
A=19°
so

$\frac{a}{sin A} = \frac{b}{sin B} \\ a*sin B=b*sin A \\ sin B= \frac{b}{a}*sin A \\ sin B= \frac{14}{13} *sin 19 \\ sin B=0.3506 \\ B=arc sin(0.3506) \\ B=20.5$ °

step 2
with angle A and angle B find the angle C
A+B+C=180-----> solve for C
C=180-(A+B)------> C=180-(19+20.5)-----> C=140.5°

step 3
$\frac{a}{sin A} = \frac{c}{sin C} \\ a*sin C=c*sin A \\ c=a* \frac{sin C}{sin A} \\ c=13* \frac{sin 140.5}{sin 19} \\ c=25.4$

the answer is
the value of c is 25.4

3 0

3 years ago

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Lelu [443]

Answer:

1 2/20

Step-by-step explanation:

7 0

2 years ago

4.1<7 as a fraction. pls workout and ill mark you brainliest

labwork [276]

Answer: