Answer:
12. 6.4
13. 20
Step-by-step explanation:
This is the Pythagorean theorem, which says a^2+b^2=c^2. So for problem 12 we have 4^2+5^2=c^2. Since, 16+25=41, c=sqrt41 which is about 6.4. For problem 13 we have 15^2+b^2=25^2. Since 25^2-15^2=400, b=sqrt400 which is 20. Hope this helps!
Answer:
800 × 7 + 60 × 7 + 2 × 7
Step-by-step explanation:
The area of the figure equals :
Area of rectangle = Length * width
Width = 7
Length = 862
862 in expanded form:
800 + 60 + 2
Hence, Multiplying the expanded form by the width ;
(800 + 60 + 2) * 7
800*7 + 60*7 + 2*7
Area =legnth times width
square=legnth times legnth
2.54 is the legnth
area=2.54 times 2.54=6.4516 cm^2
so a square inch does not equal 2.54 cm^2
Answer:
Step-by-step explanation:
let price of one pretzel=x
price of one soda=y
3x+4y=11.25 ...(1)
5x+2y=8.25 ...(2)
multiply by 2
10x+4y=16.50 ...(3)
(3)-(1) gives
7x=5.25
x=0.75
from (1)
3(0.75)+4y=11.25
2.25+4y=11.25
4y=11.25-2.25
4y=9
y=9/4=2.25
cost of one pretzel=$0.75
cost of one soda=$2.25
Answer: Only 16
Step-by-step explanation:
The square roots of 5 & 20 are long decimals.
The square root of 49 is 7 but 7 has a decimal square root.
The square root of 16 is 4, 4 is 2 squared.
So 16 is a perfect square.
