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mash [69]
3 years ago
15

Subtract. Write the answer in standard form. (12+4i)−(3−7i)

Mathematics
2 answers:
LiRa [457]3 years ago
8 0

Answer:

9+11i

Step-by-step explanation:

12-3=9

4i-(-7i)=11

Elina [12.6K]3 years ago
7 0

Answer:9 +11i

Step-by-step explanation:12 +4i-3+7i=9+11i

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If n ||m, find the value of x and the value of y.
babunello [35]

Answer: Option C

y=5, x=10

Step-by-step explanation:

If the lines m and n are parallel then the large triangle and the small triangle are similar triangles, because they have equal angles.

By definition for similar triangles it is satisfied that if they have sides of length a, b, c and a ', b' and c 'then:

\frac{a}{a'}=\frac{b}{b'} =\frac{c}{c'}

In this case

a = 12\\a' = 4\\c = 15\\c' = y

So:

\frac{12}{4}=\frac{15}{y}

3=\frac{15}{y}

y=\frac{15}{3}

y=5

Therefore

if x+y=15 and y=5 then x =10

Finally

y=5, x=10

5 0
3 years ago
In ΔBCD, the measure of ∠D=90°, the measure of ∠B=51°, and CD = 8.8 feet. Find the length of DB to the nearest tenth of a foot
EleoNora [17]

Answer:

7.1 feet

Step-by-step explanation:

7 0
3 years ago
Read 2 more answers
the attendance of your club increased by 30% from last year. there are 195 people in the club now. a. write a proportion to find
astra-53 [7]

Answer:

A.

\dfrac{x}{195}=\dfrac{100}{130}

B. 150

Step-by-step explanation:

Let x be the number of people at the club last year.

The attendance of your club increased by 30% from last year. This means that if the last year attendance was 100%, this year attandance is 100% + 30% = 130%

Thus,

x people - 100%

195 people - 130%

A. Write a proportion:

\dfrac{x}{195}=\dfrac{100}{130}

B. Cross multiply:

130\cdot x=100\cdot 195\\ \\130x=19,500\\ \\13x=1,950\\ \\x=\dfrac{1,950}{13}=150

4 0
3 years ago
2 + 2 + 9 x 19 = <br> FMOTT
tatuchka [14]

Answer:

175

Step-by-step explanation:

I would assume you are asking what 2 + 2 + 9 * 19, and that the image is merely advertisement and irrelevant info for the question.

Anyway, we are solving 2 + 2 + 9 * 19.

<u>PEMDAS: Parenthesis, Exponents, Multiplication, Division, Addition, Subtraction:</u>

That is the order of operations. We can apply that in your equation.

Since multiplication comes before addition/subtraction, we are solving 9 * 19 first. That gives 171.

Now for addition:

2 + 2 + 171 = 4 + 171.

4 + 171 = 175.

Thus, our final answer is 175.

6 0
3 years ago
Mrs. Brennan and Mrs. Prato went out for lunch. The cost of Mrs. Brennan’s lunch was $12.95 and the cost of Mrs. Prato’s lunch w
n200080 [17]
Each person would pay $13.33 dollars.
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