Answer:
Sam sokey 0.5 hours biking and 3.5 hours walking
Step-by-step explanation:
Here, we want to know the number of hours spent walking and biking
Mathematically; distance = speed * time
Let the number of hours spent walking be x and the number of hours spent biking be y
Mathematically;
x + y = 3 •••(i)
distance spent walking = 4 * x = 4x miles
distance spent biking = 12 * y = 12y miles
4x + 12y = 20
divide through by 2
2x + 6y = 10 ••••••(ii)
From i , x = 4-y
Substitute this into ii
2(4-y) + 6y = 10
8 - 2y + 6y = 10
8 + 4y = 10
4y = 10-8
4y = 2
y = 2/4 = 0.5 hours
The number of hours spent walking = 4-0.5 = 3.5 hours
Answer:
A
Step-by-step explanation:
Answer:
38
Step-by-step explanation:
Replace all the variables with the given numbers:
(5)²+2(8)÷2(2)+3(3)
Multiply the numbers to get the final equation:
25+16÷4+9
Solve:
25+16÷4+9=38
Answer: A. -6
Step-by-step explanation:
Hi there!
The smallest value is 0.424
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You might think that 0.79 is the smallest one but it also has 0 which is not written. 0.790 is bigger than 0.424
I hope that helps!
