you need a number other than 0 on the left side of the decimal point
so 0.33*10-15 is not in scientific notation
Answer:
T=1/15 or 0.0666666666
Step-by-step explanation:
plug in the information you know d=2 r=30 t=? 2=30×t using algebraic rules you decide each side by 30, so 2÷30=t getting t=1/15 or 0.066666666
Answer:
Hey there!
12x+4(x-1)=60
12x+4x-4=60
16x-4=60
16x=64
x=4
Let me know if this helps :)
Answer:
Lulu has 14 quarters and 6 dimes
Step-by-step explanation:
Let x be the number of dimes and y the number of quarters. The sum of quarters and dime is 20 coins. Then:
x + y = 20
We also know that the value of each dime is $ 0.10 and the value of each quarter is $0.25. The total value of the coins is $4.10. Then, the number of dimes times 0.10 plus the number of quarters times 0.25 will be 4.10:
0.10x + 0.25y = 4.10
So, we have a system of 2 equations and 2 unknowns:
x + y = 20
0.10x + 0.25y = 4.10
Let´s solve the first equation for y:
x + y = 20
subtract x from both sides
y = 20 - x
And now let´s replace y in the second equation:
0.10x + 0.25(20 - x) = 4.10
Apply distributive property
0.10x + 5 - 0.25x = 4.10
subtract 5 from both sides of the equation
-0.15x = -0.9
Divide by -0.15 both sides of the equation
x = 6
Now let´s calculate y:
y = 20 - x
y = 20 - 6 = 14
Lulu has 14 quarters and 6 dimes
Well it says t= 5 so you literally put 5 in for t into the equation to get y