3x+2y=11
y=5x-1
Substitute the y in the first equation:
3x+2(5x-1)=11
y=5x-1
3x+10x-2=11
y=5x-1
13x=13
y=5x-1
Now substitute the x to find the y:
x=1
y=5-1=4
Answer:
10a
Step-by-step explanation:
10a is the same as 10 * a
product is multiplication
Answer:
$0.3 per cookie
Step-by-step explanation:
a dozen is 12 cookies. 2*12 = 24.
7.20/24 = 0.3
so each cookie costs 0.3 dollars
Answer:
x = -22
Step-by-step explanation:
2(5– x)3 – 11 = 151
(10 - 2x)3 - 11 = 151
30 - 6x = 162
-6x = 132
x = -22
Answer:
22.62
Step-by-step explanation:
Given:
Side of square = 16
Length of diagonal= x
If the sides of square are 16, then by using pythagora theorem we can calculte length of diagonal:
x=
=
=22.62 !
