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How to multiply decimals when not using models
1 answer:
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Answer:
1) .
2)
hence, answer is 7/12.
3) We have to divide £72 in the ratio 2:3:1
the total of the ratio is=2+3+1=6
so on dividing 72 into 6 parts we have 72/6=12
First '2' parts=2×12=24
second '3' part=3×12=36
last '1' part=1×12=12
so dividing £72 in the ratio 2:3:1 is: £24,£36 and £12
4) 39 people out of 65 have blonde hair.
Number of people who do not have blonde hair=65-39=26
percentage people who do not have blonde hair is given by:
Hence, percentage people who do not have blonde hair is 40%
5) 20% of 90= (20/100)×90
=18
Hence, 20% of 90 is 18.
6) Factorise
7) Expand
8)
.
9)
10)
11) x= -4 y=3
and z=4 x-y^3
z=4×(-4)-3^3
z= -43
12)
13)
Hence x= -2
14) 5,10,15,20,....
Hence, nth term is 5n.
15) (63×128)/32.9=245.106.
16) 938×21=19698.
Answer:
They are equal
Step-by-step explanation:
When comparing ratios, we simply want to find out if the numbers are greater than, less than, or equal to each other. We have 4:5 and 16:20.
To find out the comparison;
Step 1: We find the LCM of the denominators ie 5 and 20, which is 20
Step 2: We divide the LCM by both sides, like this: 20÷5=4 and 20÷20=1.
Step 3: Now, multiply each ratio by the result of its individual denominator division ie
Step 4: Convert back to ratio form, we have: 16:20 and 16:20
From the above ratios, we have found out that 4:5 and 16:20 are equal when compared.
I hope this helps.