Answer:
The first step is to replace the value of x from the first equation with x in the second equation:
x=y-7
3x+15y=-1
3(y-7)+15y=-1
3y-21+15y=-1
18y=-1+21
18y=20
y= 
= 
x= 
x=
Answer:
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Answer:
Well.
Step-by-step explanation:
If its 28 km for hour. A quarter of 28 is 7 so then 28+7=35 km.
Answer:
19
Step-by-step explanation:
x - 8 + 21 ÷ 4 + 21 = 29
x - 8 + 21 ÷ 4 = 29 - 21
= 8
x - 8 + 21 = 8 x 4
= 32
x - 8 = 32 - 21
= 11
x = 11 + 8
= 19
Therefore the number is 19. A bit confusing to me at first but I solved it :)
Lola rolls two fair number cubes what is the probability that the two numbers Lola rolls include at least one 4 and have product of at least 16? Probably half of a chance
