4 years ago

(30 Points) Simplify Each Expression And Show Steps/Work

Mathematics

1 answer:

Nutka1998 [239]4 years ago

8 0

1) (2i-4)-(6i+9) = 2i-4-6i-9 = -4i-13

2) (-3+8i)+(3-8i) = -3+8i+3-8i = 0+0i = 0

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Which is the measure of angle C A). 42° B). 138° C). 180° D). 218°

eimsori [14]

Answer:

∠C° = 138°.

Step-by-step explanation:

Given : Figure.

To find : Which is the measure of angle C

Solution :We have given that

We can see from the given figure angle C and angle 45 are formed on a line.

So, it formed linear pair angle

According to property : Sum of linear pair angle is 180 degree.

Then ,

∠42° + ∠C° = 180°.

On subtracting both sides by 42.

∠C° = 180 -42.

∠C° = 138°.

Therefore, ∠C° = 138°.

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3 years ago

Solve for x in degrees

Angelina_Jolie [31]

Answer:

B. 24.3°

Step-by-step explanation:

Apply the sine rule to solve for x

Thus:

$\frac{sin(x)}{8} = \frac{sin(112)}{18}$

Multiply both sides by 8

$sin(x)= \frac{sin(112)}{18}*8$

$sin(x) = 0.4121$

$x = sin^{-1}(0.4121}$

x = 24.3° (nearest tenth)

6 0

3 years ago

The perimeter of a rectangle parking lot is 146 meters find the dimension of the lot if the length is 7 meters less than 4 times

const2013 [10]

146=2(l)+2(w) Let 4w-7=l
146=2(4w-7)+2w
146=10w-14 Add 14 to both sides
160=10w Divide by 10
16=Width Plug width back into the formula
57=Length

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4 years ago

Jocelyn is a receptionist at a dentist office. She books 72 appointments each day. Six out of every 18 appointments are cancelle

bixtya [17]

Answer: 24

Step-by-step explanation: So if 6 out of ever 18 appointments are canceled, you need to find out how many “18 appointments” go into 72. So 72 divided by 18 is four. Now if 6 appointments get canceled four times, then it will be 6 times 4, which equals 24.

6 0

3 years ago

I mean this. when write 1.

yawa3891 [41]

If the question is 7 x 200+50+6 it equals 1792

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3 years ago