Answer:
Step-by-step explanation:
a+b=83
a=83-b_____1
2a+3b=203
2a=203-3b
a=203-3b/2_____2
1-2=0
so.....
83-b-(203-3b)/2=0
83-b+(-203+3b)/2=0
83-b-101.5+1.5b=0
83-101.5-b+1.5b=0
-18.5+1/2b=0
b=-18.5*2= -37
so.........
we know thaaaaat -37+A =83
SO A=83+37=120
I THINK I DID IT CORRECTLY,ANYWAY CHECK IT YOURSELF IF IT IS CORRECT PLZ MARK ME AS BRAINLIEST
Answer: 15 crocodriles
Step-by-step explanation:
We know that the ratio is 4:3
This means that for each 4 hippos, we have 3 cocodriles.
We know that there are 20 hippos.
How many groups of 4 hippos we have?
n = 20/4 = 5
So we have 5 groups of 4 hippos, this means that we also have 5 groups of 3 crocodiles, then we have:
3*5 = 15 crocodiles
Answer:
The river is 3.15 feet deep.
Step-by-step explanation:
First let's recognize what we need to find: the depth of the river
We know last year the river was 4.2 feet deep, but it dropped 25%. This means we also need to find how much it dropped. To find this, we need to know what 25% of 4.2 is. Write an equation for this.
y = 25% of 4.2
y = 0.25 • 4.2
y = 1.05
This means that the river dropped 1.05 feet. To know its depth now, we need to subtract 1.05 from 4.2. Write an equation for this.
d = 4.2 - 1.05
d = 3.15
The river is 3.15 feet deep.
Hope this helps!
Fixed expense, as this will be a large portion of your money being used. While the amount is not always a set amount, it's still a fixed expense to you.