Compute
(−15)+(−13)−17−(−30)
−15
Solve the equations:
|x-3|=5
x = −2, x = 8
Write coordinates of the vertex of the graph
y=|x−2|
(2,0)
0.5(2y–1)–(0.5–0.2y)+1=0
y = 0
One man is three times as old as another. Fifteen years ago the first was six times as old as the second. Find their ages now.
The older man is 75 years old, and the other man is 25 years old.
1.5−(−2.6)+7.1−(−4 4/5)
16
Solve the equations:
|15−2x|=−2
x = ∅
Write coordinates of the vertex of the graph
y=|x+2|
(-2,0)
3x–5(2–x)=54
x = 8
Helen is 8 years older than Jane. Twenty years ago Helen was three times as old as Jane. How old is each now?
Helen is 32 years old. Jane is 24 years old.
(3−3/5)(4 1/2−1/3)
10
Solve the equations:
|5x+8|=0
x = −1.6
Write coordinates of the vertex of the graph
y=−|x+2|
(-2,0)
6+(2–4x)+5=3(1–3x)
x = −2
A child is 12 years old, and his father is 32 years older. In how many years will the age of the father be 2 times the age of the child?
In 20 years.
(3+25)÷(412−14)
0.8
Simplify |a−5|, if a>5
a − 5
Write coordinates of the vertex of the graph
y=|x|+2
(0,2)
What weight of dry substance is in 150g of a 3% substance solution? What weight of an 8% solution can we have with the same weight of dry substance?
50 grams of 12% solution of boric acid and 30 grams of 20% solution of boric acid.
A collection of 109 coins is made up of quarters, dimes, and nickels. There are 7 fewer dimes than quarters and 3 less than five times as many nickels as dimes. Find the amount of the collection.
The amount of collection is $10.60.
Evaluate:
|a+1|+|b−c|−|−8|
for a=3, b=5, c=12.
3
Simplify |a+5 |, if a<−5
− a − 5
Write coordinates of the vertex of the graph
y=|x|-2
(0,-2)
What weight of dry substance is in 150g of a 3% substance solution? What weight of an 8% solution can we have with the same weight of dry substance?
4.5g of dry substance and 56.25g of an 8% solution.
A bank teller has some five-dollar bills and some twenty-dollar bills. The teller has 4 more of the twenties. The total value of the money is $305.00. Find the number of twenty-dollar bills.
13 twenty − dollar bills.