Ratios and Proportional
2x-4=
20
-h-(-9)
0
Evaluate a divied b if a =
11
-0.2=
-1/5
-7 and 1/20=
-7.05
Pep Club members are making spirit buttons. They make 490 spirit buttons in 3 and half hours. Find the number of buttons the Pep Club makes per hour?
140 spirit buttons per hour
-j+h-k=
-31
rs divied 16
-3
The screen on Brinna's new phone is 3.85 centimeters long. Whaat mixed number represents the length of the phoone screen.
2 17/20 cm
-9/10=
-0.9
1/12 divided by 5/6
1/10
27- (-8)=
35
Divide-200 by - 100
2
7 and 1/3 =
-4 4/25=
-4.16
Mrs. Frasier is making costumes for the school play. Each costume requires 0.75 yards of fabric. She brought 6 yards of fabric. How many costumes can Mrs. Frasier make?
She can 8 costumes.
If x and y are postive intergers, is x-y always postive? Explain.
No; if x>y, the difference is postive. If x <y, the difference is negative. If x = y, the difference is zero.
-100 divided (-10)
10
Nicolas practiced playing the cello for 2 hours and 18 minutes. Write the time Nicolas spent practicing as a decimal.
2.3 hours
-4/9=
-0.4 repeated
What is a complex fraction?
Complex fractions are fractions with a numerator, or both that are also fractions.
Bryan estimates the cost of a vacation to be $730. The actual vacation is $850. Find the percent error. Round to the nearest whole percent if necessary. Is the percent positive or negative? Explain.
-14%; The percent is negative because the estimate is lower than the actual amount.
The boiling point of water is affected by changes in elevation. Use the expression -2A divied by 1,000, where A represents the altitude in feet, to find the changes at an altitude of 5,000 feet. Then explain its meaning.
-10degress F; The boiling point decreases 10 degress F at an altitudeof 5,000 Feet
2.66=
2 and 33/50
How can you write a fraction as a decimal?
When a fenominator is a factor of a power of 10,use mental math. Or, you can divide the numerator of any fraction by its denominator.