Algebra Answers

And Mrs. Hall’s class of 30 students, 17 as computers at home in 20 have concerts. If for students in the class have neither the computer nor a classic, how many of the 30 students have both.

2b+b-56=2b-7

2x-3=5x+12
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Do you multiply or divide for this question, " Out of 18 times at bat, Emily got a hit 5/6 of the time and Julie got a hit 8/9 of the time. Who got more hits? How many more? " ?

what number remains the same when rounded to the nearest thousand and ten thousand

You will come across multiple inequalities in your work and will be asked to express your answers in interval notation. A quick note about interval notation with multiple parts: Suppose your answer was x<2 or x>10. In interval notation, each of these should look like ( − ∞ , 2 )and( 10 , ∞ ). To express this in interval notation, we say ( − ∞ , 2 ) ∪ ( 10 , ∞ ). The ∪ in the middle stands for union and means that you are joining both of those intervals together.

Express the following inequalities in interval notation − 10 < x ≤ 4 or x>7.

visualize the solution of the absolute value inequality | x − 4 | + 3 ≤ 7. What is the solution to the inequality?

Being able to state in words what an inequality is saying is an important part of making sense of the inequality. Read the statement x ≤ 4 in your head, using the terms "less than, greater than, equal to."

1. The water/cement ratio of a concrete mix is the ratio of the mass of water in the mix to the mass of cement in the mix. If the ratio of a mix is specified as 0.40, how much water should be added to a mixture with 25 kg of cement. 2. The profit y of selling a product is partly constant and party varies directly as the number of products sold x. When x=1, the profit y is $15. When x=100, y=$213. (a) Find the relation between the number of items sold x and the profit y. (b) Find the profit when the number of items sold is 5.

1. The water/cement ratio of a concrete mix is the ratio of the mass of water in the mix to the mass of cement in the mix. If the ratio of a mix is specified as 0.40, how much water should be added to a mixture with 25 kg of cement.

2. The profit y of selling a product is partly constant and party varies directly as the number of products sold x. When x=1, the profit y is $15. When x=100, y=$213.

(a) Find the relation between the number of items sold x and the profit y.
(b) Find the profit when the number of items sold is 5.