The correct answer to the first task, is:
7(x-3) = 4(x + 5) ( im assuming x + 5 by the ordering of the numbers, and ive seen many people doing the same mistake.)
7x-21 = 4x + 20
7x-4x = 21+20
3x = 41
The answer is 41/3.
I found this quite ugly, so i will do it by multiplication as it is acctualy written, also.
7x - 21 = 20x
7x-20x = 21
-13x = 21
x = -21/13 which is just as ugly.
If i input a - however:
7x-21 = 4x-20
3x = 1
x = 1/3
Thats all the possible answers, (except by division).
The correct answer to the second task, is 14 - x. Because she was x years younger than 14.
Answer:
257.24 yd^2
Step-by-step explanation:
I made a video explaining, I promise it’s not anything unrelated to the question. Here it is: https://youtu.be/jHVtTCYzmzI
8.66666667 that’s your answer
Answer:
#1. First label the function as y=f (x) #2. Express x as a function of y #3. Find all possible values of y for which f (y) is defined y y. #4. Element values of y by looking at the initial function f (x)
Step-by-step explanation:
Answer: x = 0 , y = -4
Step-by-step explanation:
4x - 3y = 12 } Equation 1
y = 7x - 4 } Equation 2
<em>We can substitute the value of y from equation 2 in equation 1: </em>
4x - 3(7x - 4) = 12
4x - 21x + 12 = 12
-17x = 12-12
-17x = 0
x = 0
<em>Now we can substitute this value of x in equation 2 :</em>
y = 7x - 4 } Equation 2
y = 7·0 - 4 = -4
Answer: x = 0 , y = -4
<h2><em>Spymore</em></h2>