Simplify. −7i⋅(−8i) −56 −56i 56i 56

Mathematics

2 answers:

Novay_Z [31]3 years ago

8 0

Your answer is A. -56
Hope this helps!

matrenka [14]3 years ago

8 0

A. -56

This should be your correct answer!

Hope this helps!

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A bag contains 4 red marbles, 2 blue marbles, 1 purple marble, and 3 green marbles. 4 red marbles, 2 blue marbles, 1 purple marb

alukav5142 [94]

Hello,

There are 4 + 2 + 1 + 3 = 10 marbles in the bag.

The probability to get a red marble is 4/10 = 2/5 ; the probability to get a blue marble is 2/10 = 1/5 ; the probability to obtain a purple marble is 1/10 and the probability of getting a green marble is 3/10.

Have a nice day !

7 0

2 years ago

Read 2 more answers

The raised vegetable garden in Susan's yard is in the shape of a rectangular prism with a volume of 48 cubic feet and a height o

Anna11 [10]

The correct question is
The raised vegetable garden in Susan's yard is in the shape of a rectangular prism with a volume of 48 cubic feet and a height of 3/4 foot. The base of the rectangular prism is not a square and the width is greater than 2 feet. What is the length and width of the rectangular prism?

let
x-------> the length of the base of the rectangular prism
y-------> the width of the base of the rectangular prism

we know that
volume of the prism=area of the base*height
volume=48 ft³
height of the prism=3/4 ft

area of the base=volume/height--------> 48/(3/4)---> 48*4/3----> 64 ft²

area of the base=64 ft²
area of the base=x*y
64=x*y--------> equation 1

y=x+2--------> equation 2

substitute equation 2 in equation 1
64=x*[x+2]-----> 64=x²+2x------> x²+2x-64=0

using a graph tool----> to resolve the second order equation
see the attached figure

the solution is
x=7.062 ft
y=x+2-----> y=7.062+2-----> y=9.062 ft

the answer is
the length of the base of the rectangular prism is 7.062 ft
the width of the base of the rectangular prism is 9.062 ft