Answer:
80 cookies
Step-by-step explanation:
25% of 64 is 16
16+64=80
Answer:
4x² + 4x + 1
Step-by-step explanation:
We know that (a + b)² = a² + 2ab + b², therefore, (2x + 1)² = 4x² + 4x + 1.
The height of the blue spruce was 45.
We find the mean by adding all of the data points and dividing by the number of data points. We will add the unknown value x and change the number we're dividing by to 7:
(160+320+100+110+200+220+x)/7 = 165
(1110+x)/7 = 165
Multiply both sides by 7:
1110 + x = 1155
Subtract 1110 from both sides:
x = 45
Step-by-step explanation:
x=−y−2z+3
x=y+32z+1
x=13y+23z+13
Explain why dosea mountain climber needs an oxygen supply at very high altitude even through the air still contains 21% oxygen