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Mariana [72]
4 years ago
7

I need it in standard form & to be simplified

Mathematics
1 answer:
Sergeu [11.5K]4 years ago
7 0

  -i + (7 - 5i) - 3(2 - 3i)

=  -i + 7 - 5i - 6 + 9i

=  -i - 5i + 9i   + 7 - 6

=  3i  + 1

Answer: 3i  + 1


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A rectangle has a length that is 9 feet less than four times its width. Its area is 90 square feet
kramer

Answer:

The length of rectangle is 15\ ft

The width of rectangle is 6\ ft

Step-by-step explanation:

Let

x-----> the length of rectangle

y----> the width of rectangle

we know that

The area of rectangle is equal to

A=xy

A=90\ ft^{2}

so

90=xy -----> equation A

x=4y-9 -----> equation B

substitute equation B in equation A and solve for y

90=(4y-9)y

4y^{2}-9y-90=0

using a graphing calculator

The solution is

y=6\ ft

Find the value of x

x=4y-9  -----> x=4(6)-9=15\ ft

5 0
4 years ago
Jacob rode his bike 5 3/4 miles last week. This week,he rode 4 times as far as he rode last week. How many miles did Jacob ride
Bess [88]

Answer:

Hope this helps

Step-by-step explanation:

1. Make 5 3/4 into an improper fraction. That would be 23/4. 2. Write 4 in a fraction way. That would be 4/1. 3. Now do 23/4 X 4/1. That would be 92/4. 4. Turn it into a mixed number by doing 92 divided by 4. That would be 23. No fraction after 23. Jacob rode his bike 23 miles this week. :)

4 0
3 years ago
Read 2 more answers
A special olympics event has 12 more boys than girls competing the total number of participants is 1000 how many boys conpeted a
kodGreya [7K]
Subtract 1000 by 12. Divide that answer by 2. Add 12 to that answer.

Equations:
1000 -12= 988     988÷2=494      494+12=506

506 boys and 494 girls competed at the special olympics event.
4 0
3 years ago
What is the sum of -64/5 and 64/5 ?
77julia77 [94]

Answer and Explanation

<h2>0</h2>

<em>This is because they are both the same opposite number, and you are adding.</em>

But, if it was, \frac{64}{5}+\frac{64}{5} then it would be 25.6 or \frac{128}{5}.

<em>So, the answer is 0.</em>

<em>Hope this helps =)</em>

4 0
3 years ago
Which expresssion has a value of 1​
Ilya [14]

Answer:

it is 1

Step-by-step explanation:

3 0
3 years ago
Read 2 more answers
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