Hello from MrBillDoesMath!
Answer:
x = -11, y = 6
Discussion:
I don't understand the answer shown -- "Doesn't Exist" -- especially as part of the problem statement is not displayed, BUT
-6x + 3y = 84 => divide both sides by 3
-2x + y = 84/3= 28
-2x + y = 28 (A)
Multiply X = -23 + 2Y by 2 to get
2x = - 46 + 4y (B)
Adding (A) and (B) gives
(-2x + y ) + (2x) = 28 + (-46 + 4y) =>
y = 28 -46 + 4y => as -2x + 2x = 0
y = -18 + 4y =>
18 = 3y =>
y = 6
From (A) -2x + (6) = 28 or -2x = 28 -6 = 22 so x = -11
Thank you,
MrB
Answer:
25.9 feet per second.
Step-by-step explanation:
For the first 14 seconds, the change in elevation was –65×14= –910 feet.
For the remaining 6.5 minutes, the change in elevation was –1,470×6.5 = –9,555 feet.
The overall change in elevation was –910+ –9,555= –10,465 feet.
The total number of seconds was
6.5×60=14+390=404 seconds. The Average change in elevation was −10,465÷404=25.9 feet per second.
[RevyBreeze]
1. 13
2. by multiplying by 10
3. 13.41
4. A. 10+9+.90+.08
B. nineteen point Ninety Six
Answer:
Step-by-step explanation:
If there are 90 students and the ratio of boys to girls is 3:2, that means 3x+2x=90
Combine like terms: 5x=90
x=18
2x (girls)=36
3x (boys)=54
1/3 of the boys scored full marks, so 54/3=18 boys scored full marks
The number of girls who scored full marks is half of the number who did not score full marks means that 1/3 of the girls scored full marks. 36/3=12, so 12 girls scored full marks.
(I don't know what the question is sorry if it's incorrect but there's not enough information)
Hope this helps!
1. Set up the long addition.
4.30 + 2.75
2. Calculate 0 + 5, which is 5.
4.30 + 2.75 = 5
3. Calculate 3 + 7, which is 10.
since 10 is two-digit, we carry the first digit 1 to the next column
1
4.30 + 2.75 = 05
1
4.30 + 2.75 = 7.05
5. Therefore, 4.3 + 2.75 = 7.05.
7.05
