False... a ratio equivalent to 2:5 is 4:10
2/5 × 2/2 = 4/10
Answer:
42
Step-by-step explanation:
4+6 = 10
10+7 = 17
17+2 = 19
19+9 = 28
28+2 = 30
30+9 = 39
39+3 = 42
The units are always squared.
The area can be found when given the diameter by first finding the radius.
Circumference can be used to find area.
Answer:
26 A =1690.48 in^2
27 B 10 2/15 hours
Step-by-step explanation:
26. The area of the mat is given by
A = l*w
where l = 74.8 and w = 22.6
A = 74.8 * 22.6
A =1690.48 in^2
27. The candle is 11 2/5 inches tall. It burns 1 1/8 inches per hour
We need to divide
11 2/5 ÷ 1 1/8
Changing to improper fractions
11 2/5 = (5*11+2)/5 = 57/5
1 1/8 = (8*1+1)/8 = 9/8
57/5 ÷9/8
Copy dot flip
57/5 * 8/9
456/45
Change back to a mixed number
45 goes into 456 10 times with 6 left over
10 6/45
10 2/15 hours
Mostly collect like terms
use associative property which is
(a+b)+c=a+(b+c)
and remember that:
you just use a general rule
x+x=2x
x^2+x^2=2x^2
3xy4xy=7xy
3x+4x^2=3x+4x^2
you can only add like terms( like terms are terms that are same name like x or y are differnt, and like terms have same power exg x^2 and x^3 and x^1/2 and such
so first one
3b+11c-4c-c
since they are all c except for the first one term, just assign a number for each so it simplifies to c times(11-1)+b(3-4)=c(10-1b=10c-b or
you just use a general rule
x+x=2x
x^2+x^2=2x^2
3xy4xy=7xy
3x+4x^2=3x+4x^2
second one9a-1+8c-8a+c
group like terms
(9a-8a)+(8c+c)-1=(a)+(9c)-1=a+9c-1
12c+5a+7-13c+4a
group like terms(12c-13c)+(5a+4a)+7
add like terms
-c+9a+7
the solution is 9a-c+7
-15-6c+3b-6c+9-2b
group like terms
(-15+9)+(-6c-6c)+(3b-2b)
-6+(-12c)+b=b-6-12c
the answers are:
10c-b
a+9c-1
9a-c+7
b-12c-6
