Answer:
36 black keys
Step-by-step explanation:
9(88-x)=13x
792-9x=13x
792=22x
x=36
Hope this helps: )
Answer: Choice C
The pink equation is y = 2x-3
The yellow equation is y = -2x+1
Notice how the pink equation crosses the y axis at (0,-3) or at -3 on the y number line. This tells us that the pink equation has a y intercept of -3. So b = -3
This only happens with the equation y = 2x-3. The other equations do not have a y intercept of -3. So this quickly rules out the other choices leaving C as the only answer.
An alternative is to find two points on the pink line, such as (0,-3) and (1,-1). Then find the slope of the line through those points. You should find the slope to be m = 2. So m = 2 and b = -3 leads to y = 2x-3. Follow similar steps for the yellow line as well.
Answer:
Step-by-step explanation:
if you need help let me know
3/4 can be written as 6/8 which is smaller than 7/8 so 7/8 is bigger than 3/4
Answer:
268
Step-by-step explanation:
7a³ -5b² = ?
when a = 4 and b= 6
7(4)³ -5(6)² = 7(64) - 5(36) = 448 - 180 = 268