If s represents the number of students, then the number of pizzas is
s/4 + 2 = 9
s/4 = 7 . . . . . . subtract 2
s = 28 . . . . . . multiply by 4
There are 28 students.
Substitute y = 2x + 3 into y = -x - 9
2x + 3 = -x - 9
Solve for x in 2x + 3 = - - 9
x = -4
Substitute x = -4 into y = 2x + 3
y = -5
Therefore,
<u>x = -4</u>
<u>y = -5</u>
Answer:
B
Step-by-step explanation:
because.
Answer: About 50 cents 0.50
Step-by-step explanation: 2.99 / 6 = 0.50
Answer:
29% . . . or . . . 290‰
Step-by-step explanation:
The ratio of weight of salt to weight of water was ...
(14.5 g)/(50 g) = 29/100 = 29%
Sometimes, salinity is expressed as "parts per thousand".
29/100 = 290/1000 = 290‰
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Use of the abbreviation "PPT" for "parts per thousand" is not recommended, as that abbreviation has several different interpretations, including "parts per trillion."