1. A.
x parrot fish + y triggerfish = 320 total fish.
y = 7x shows that there are 7 times as many triggerfish.
2. C
x + y shows a total score of 425.
y = 2x - 70 shows that Michael's score, y, is 70 less (minus) than twice Kathryn's
3. write two equations
x + y = 27 total feet
2x + 3 = y
Substitute 2x + 3 for y in the first equation
x + (2x + 3) = 27
3x + 3 = 27
3x = 24
x = 8
Substitute 8 in to either equation to find the other length.
8 + y = 27
y = 19
The shorter piece is 8 and the longer piece is 19
4. x + y = 3200 people -> y = 3200-x
8x + 12y = 33,040 dollars
8x + 12(3200 - x) = 33040
8x + 38400 - 12x = 33040
-4x = -5360
x = 1340 (1340 children)
1340 + y = 3200
y = 1860 adults
5. I don't think the numbers for this were put in correctly because I get a decimal and a negative number when I solve for it but hopefully if you do get the correct cost/amount of coins you will understand this well enough to do it on your own. Hope I helped!
Answer:
x < (-0.5)
Step-by-step explanation:
If you have any questions about the way I solved it, don't hesitate to ask
Option c 71 3/4
Step-by-step explanation:
Step 1 :
The area of a rectangle is length * breadth
Step 2 :
Given length = 15 3/8 = 123/8 (converting mixed fractions into improper fractions)
Breadth = 4 2/3 = 14/3
Step 3 :
Hence the area of the rectangle = length * breadth
= 123/8 * 14/3 = 1722/24 = 71 3/4 (converting improper fractions into mixed fractions)
You have to think about what y and x can be equal to for you to get 12. (Hint: y is going to be a bigger number than x)
Ex: 3y-5x=5
Think: 3 x 10(y) - 5 x 5(x)= 5
So, y would be 10 and x would be 5.
Answer:
log2 (4) + log2 (x)
Step-by-step explanation:
took the test