1. Nina's car payment is $362.57 per month for 4 years. how much will she pay altogether? $17,401.92 is this correct?
2. solve the unknown. 4/X= 3/15= 60/X is this correct?
3.write 2/5 as a percent. = 40% is this correct?
4. write 78% as a decimal. 0.78 is this correct?
1. You're close - but I get a slightly different answer. Run the numbers through a calculator again.
2. Cross multiply in this proportion.
4/x = 3/15
3x/60
x = 60/3
x = 20
Your last two answers are correct.
1. To calculate how much Nina will pay altogether, multiply her monthly car payment by the number of months she will be making payments. Since she pays $362.57 per month for 4 years (which is 48 months), the calculation will be: $362.57 * 48 = $17,401.92. So your answer is correct.
2. To solve the unknown in the equation 4/X = 3/15 = 60/X, we can use cross-multiplication. Starting with the first equality (4/X = 3/15), you can cross-multiply to get 4 * 15 = 3 * X. Simplifying this gives you 60 = 3X. Now, moving to the second equality (3/15 = 60/X), you cross-multiply to get 3 * X = 15 * 60. Simplifying this gives you 3X = 900. Therefore, the value of X is 900/3 = 300. So your answer is not correct.
3. To write 2/5 as a percent, you need to divide the numerator (2) by the denominator (5) and multiply the result by 100. So the calculation is (2/5) * 100 = 40%. Therefore, your answer is correct.
4. To write 78% as a decimal, you need to divide the percentage value by 100. So, 78% becomes 78/100 = 0.78. Therefore, your answer is correct.