4a + 6b = 10
2a - 4b = 12...multiply by -2
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4a + 6b = 10
-4a + 8b = - 24 (result of multiplying by -2)
------------------add
14b = - 14
b = -14/14
b = -1
2a - 4b = 12
2a - 4(-1) = 12
2a + 4 = 12
2a = 12 - 4
2a = 8
a = 8/2
a = 4
so 12a = 12(4) = 48 <==
Total no. of births = 2000
Births of girls = 64
Birth% of girls
Hence, the number of girls are significantly low.
Answer:
r=40% or .4
Step-by-step explanation:
32=16(1+r)^2
Answer:
x=5
y=1
Step-by-step explanation:
3*5=15
5*1=5
15+5=20
4/9 times 4/9 is 16/81.
To make 4/9 of a recipe, 16/81 cups of granola needed.
