14. on a certain day the exchange rate of mexican pesos for u.s. dollars was approximately 100 pesos for 1 dollar. if an exchange of 8,000 pesos was made that day,what was the approximate value of the exchange in dollars?
a. $80
b. $8,000
c. $800
d. $80,000
13. the graph of linear equations y = 2x - 3 and y = 3x - 7
if 2x - 3 = 3x -7 what is the value of x?
a. 4
b. 5
c. 9
d. 10
11. the graph of the function y = x^2 - 3
if the graph of the orignal function is shifted 5 units up, which of the following equations best represent the translation of each point on the curve?
a. y = x^2 + 5
b. y = x^2 + 2
c. y = x^2 - 2
d. y = x^2 -8
10. a jar contains6 red marbles and 10 blue marbles all of equal size. if dominic were to randomly select 1 marble without replacement and then select another marble from the jar, what would be the probablity of selecting 2 red marbles from the jar?
a. 9/64
b. 1/8
c. 3/5
d. 3/8
thanks for helping please explain why you got the answer thank you :)!
a. $80
b. $8,000
c. $800
d. $80,000
13. the graph of linear equations y = 2x - 3 and y = 3x - 7
if 2x - 3 = 3x -7 what is the value of x?
a. 4
b. 5
c. 9
d. 10
11. the graph of the function y = x^2 - 3
if the graph of the orignal function is shifted 5 units up, which of the following equations best represent the translation of each point on the curve?
a. y = x^2 + 5
b. y = x^2 + 2
c. y = x^2 - 2
d. y = x^2 -8
10. a jar contains6 red marbles and 10 blue marbles all of equal size. if dominic were to randomly select 1 marble without replacement and then select another marble from the jar, what would be the probablity of selecting 2 red marbles from the jar?
a. 9/64
b. 1/8
c. 3/5
d. 3/8
thanks for helping please explain why you got the answer thank you :)!
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14)
100/1 = 8,000/x...cross multiply
8,000 = 100x...divide both sides of the equation by 100
8,000/100 = 100x/100
80 = x
8,000 pesos is about 80 dollars
13)
2x - 3 = 3x -7...subtract 2x from both sides
-3 = 3x - 7 - 2x...add 7 to both sides
-3 + 7 = 3x - 2x...add/subtract like terms
4 = x
11)
x^2 - 3 = y...This equation shifted up up five units would read:
x^2 - 3 + 5 = y
x^2 + 2 = y
10)
The probability on the first draw is 6/16, which can be simplified to 3/8. If a red marble is chosen, the probability on the second draw would be 5/15, which can be simplified to 1/3. Now just multiply these results together to get the probability of drawing 2 red marbles
(3/8)(1/3) =
3/24 =
1/8
100/1 = 8,000/x...cross multiply
8,000 = 100x...divide both sides of the equation by 100
8,000/100 = 100x/100
80 = x
8,000 pesos is about 80 dollars
13)
2x - 3 = 3x -7...subtract 2x from both sides
-3 = 3x - 7 - 2x...add 7 to both sides
-3 + 7 = 3x - 2x...add/subtract like terms
4 = x
11)
x^2 - 3 = y...This equation shifted up up five units would read:
x^2 - 3 + 5 = y
x^2 + 2 = y
10)
The probability on the first draw is 6/16, which can be simplified to 3/8. If a red marble is chosen, the probability on the second draw would be 5/15, which can be simplified to 1/3. Now just multiply these results together to get the probability of drawing 2 red marbles
(3/8)(1/3) =
3/24 =
1/8
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1.a set up a proportion and solve
2. a when you subtract 2x from both sides and add 7 to both sides you get 4.
3. b -3 + 5 = 2
4. b 6/16= 3/8 5/15=1/3 3/8x1/3=3/24 which = 1/8
2. a when you subtract 2x from both sides and add 7 to both sides you get 4.
3. b -3 + 5 = 2
4. b 6/16= 3/8 5/15=1/3 3/8x1/3=3/24 which = 1/8
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aabcd and you should do your OWN math homework.
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a
a
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b
d
a
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14. 100/1=8,000/x
solve for x and you will get x=$80
13. 2x-3=3x-7
get 2x=3x-4 by adding 3 to both sides
get -1x=-4 by subtracting 3x to both sides
x=4
11. since it is shifted 5 units up, you need to add 5 to the y intercept. you get y=x^2 +2
10. "without replacement" is when You do not put the object back in the bag so that the number of marbles is one less than for the first draw.
So the probability of getting a red marble on the first try is 6/16
the probability of getting a red marble on the second try is 5/15
Therefore the probability of getting 2 red marbles is (6/16)(5/15)=30/240=1/8
solve for x and you will get x=$80
13. 2x-3=3x-7
get 2x=3x-4 by adding 3 to both sides
get -1x=-4 by subtracting 3x to both sides
x=4
11. since it is shifted 5 units up, you need to add 5 to the y intercept. you get y=x^2 +2
10. "without replacement" is when You do not put the object back in the bag so that the number of marbles is one less than for the first draw.
So the probability of getting a red marble on the first try is 6/16
the probability of getting a red marble on the second try is 5/15
Therefore the probability of getting 2 red marbles is (6/16)(5/15)=30/240=1/8