I'm studying for a quiz but I don't know how to do these two questions! Can someone explain them to me?

Mathematics

2 answers:

uranmaximum [27]2 years ago

6 0

Where are the questions so I can help you?

Lemur [1.5K]2 years ago

5 0

Answer:

yes mate, what r ur questions??

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Which expression is equivalent to 3i(9i +15)? - 45 +9i -27 + 452 27 +452 2722 + 452

vaieri [72.5K]

Answer: B. -27+452i

Step-by-step explanation: Simplify the real and imaginary parts of the expression.

Hope this helps you out.

3 0

2 years ago

Please help this needs to be turned in by tonight

KonstantinChe [14]

Answer:

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Step-by-step explanation:

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2 years ago

Solve for x. 2 1/2x−3/4(2x+5)=3/8

RUDIKE [14]

$2 \frac{1}{2}x- \frac{3}{4}(2x+5)= \frac{3}{8}$
$2 \frac{1}{2}x- \frac{6}{4}x- \frac{15}{4}= \frac{3}{8}$
$( 2\frac{1}{2}- \frac{6}{4})x= \frac{3}{8}+ \frac{15}{4}$
$( \frac{5}{2}- \frac{6}{4})x= \frac{3}{8}+ \frac{15}{4}$
$( \frac{10}{4}- \frac{6}{4})x= \frac{3}{8}+ \frac{30}{8}$
$\frac{4}{4}x= \frac{33}{8}$
$x= \frac{33}{8}=4 \frac{1}{8}$

Correct answer: C

6 0

3 years ago

Tell what you would do to isolate the variable. -5c = 5/24

Masteriza [31]

To isolate the variable here is what you would do:

−5c= $\frac{5}{24}$