If he can read 21 pages in 1 hour he can read 63 in 3 hours
Answer:
2x-15=12
Step-by-step explanation:
Plug in
2(2) + 3(-3) + (-5)
4 + (-9) + (-5)
4 + (-14)
-10
Answer is -10
2x + 3y + z = -10
Πr²h=175
πr²*7=175
Divide both sides by 7
πr²=25
Divide both sides by π (3.14)
r²=7.96
Square root of 7.96=2.82
r=2.82
Diameter is 2r. 2.82*2
2.82*2=5.64
Answer:
there are 15 birds all together and 5 black birds on the tree.
Step-by-step explanation:
