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4 years ago

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

$A=xy$

$A=90\ ft^{2}$

$90=xy$ -----> 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

<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 $\frac{128}{5}$ .