Answer:
Rene made = 90 on her math test
If she answer =20problems correctly
we know,
how many problem were there = ?
there where = 90-20
= 70
There where 70 problems
IF EC = 8, than we know for sure that the length of AC would be 2 x 8 = 16
The formula to use in determining Rhombus area is
A = (AC . DB)/2 , so the value x could be found with this equation :
72 = 16 (x-1) / 2
72 = (16x -16) /2
72 = 8x - 8
80 = 8x
x = 10
Let
x------> hours worked by Sara last week
y------> hours worked by Joan last week
z------> hours worked by Erin last week
we know that
x=28 hours ------> equation 1
y=x-6-----> equation 2
substitute the value of x in equation 2
y=28-6=22 hours
z=y/2------> equation 3
substitute the value of y in the equation 3
z=22/2=11 hours
<u>the answer is</u>
Sara worked 28 hours last week
Joan worked 22 hours last week
Erin worked 11 hours last week
The multiplier for decreasing by 40% is 0.60. Since we want to know what was reduced by 40% (0.60), we divide the new price by the multiplier:
840 / 0.6 = 1,400
So the original price was 1,400
The solution to the system of equations is x = 3/2 and y = 6
<h3>How to determine the solution of the equation?</h3>
The system of equations is given as:
1/2x = 3/4 and y = 6
The variables x and y in each of the above equations are independent
This is so because they only occur in one equation at a time
So, we have:
1/2x = 3/4
Multiply both sides by 2
x = 3/2
Hence, the solution to the system of equations is x = 3/2 and y = 6
Read more about equations at:
brainly.com/question/2972832
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