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Julli [10]
4 years ago
5

What point if any is on both of the following lines? 2x-7y=9 4x-14y=-18

Mathematics
1 answer:
dalvyx [7]4 years ago
5 0

Answer:

No Solution.

Step-by-step explanation:

2x-7y=9

4x-14y=-18

------------------

-2(2x-7y)=-2(9)

4x-14y=-18

------------------------

-4x+14y=-18

4x-14y=-18

-------------------

0=-36

no solution

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You roll a red number cube and a blue number cube. What is the probability you roll a red 2 and a blue 2?
zalisa [80]

Answer:

The answer will be 4

3 0
3 years ago
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What are the zeros of f(x)= x^2+x-30
Westkost [7]

Answer:

C

Step-by-step explanation:

The zeros of the function is the roots and solutions. To find them, factor the equation into two binomials.

x^2 + x -30\\(x+6)(x-5)

To solve, set each binomial to 0 and solve for x.

x+6 = 0

x = -6

x-5=0

x=5

8 0
3 years ago
A light bulb consumes 4560 watt-hours in 4 days and 18 hours. how many watt-hours does it consume per day?
zaharov [31]
This is actually an easy one. 

4 day= 24 hours X 4 = 96 hrs.

4560 = 96 hrs.

4560/96 = per hr. 

47.5 watts per hr.

Since 1 day = 24 hrs, 47.5 X 24 = 1140 Watts per day.

See? Simple and easy if you solve parts at a time!





4 0
3 years ago
Can someone solve this with the method of subtraction using addition please quick
Zina [86]

Answer:1. X=2 y=4

2. X=2.5 y=3

3.x=0 y=-1

Step-by-step explanation:

1. 6x=12

x=2

replace

4+y=8

y=4

2.

8x=20

x=2.5

replace

5+3y=14

y=3

3.

-6y=6

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3 0
3 years ago
CALLING ALL MATH GENIUS!!! Help! Please!
IrinaK [193]

2) 7/8+1/3+1/2=1\frac{17}{24}, so your answer is A

3) 1/9+1/12, it's LCD (lest common denominator) is 36, \frac{1*4}{9*4} + \frac{1*3}{12*3} = \frac{4}{36} + \frac{3}{36} = \frac{4+3}{36} = \frac{7}{36} so your answer is also A

4) 13+\frac{1}{4} +\frac{2}{3} find the Least Common Multiple (LCM) of

4, and 3, which is 12. Now make the denominators the same as the LCD, 13+\frac{1*3}{4*3} +\frac{2*4}{3*4}. Now Simplify; 13+\frac{3}{12} +\frac{8}{12} =13+\frac{3+8}{12} =13\frac{11}{12}, D is your answer.

5) LCD=9, so make the denominators the same as the LCD, \frac{4}{9} - \frac{1*3}{3*3} = \frac{4}{9} - \frac{3}{9} = \frac{4-3}{9} =\frac{1}{9}. Your answer is B.

6) 30-22\frac{5}{6}, (use.the.rule...a\frac{b}{c}=\frac{ac+b}{c}...because.22\frac{5}{6}.is.an.improper.fraction)

30-\frac{22*6+5}{6} =30-\frac{132+5}{6}=30-\frac{137}{6} = make the denominators the same 30*\frac{6}{6} -\frac{137}{6} =\frac{180}{6} -\frac{137}{6} =\frac{43}{6} =7\frac{1}{6}

7) 9\frac{5}{12} is an improper fraction, so you the previous rule I said to use for improper fractions.

\frac{9*12+5}{12} -4\frac{2}{3} =\frac{108+5}{12}-4\frac{2}{3}, also 4\frac{2}{3} is an improper fraction so use the rule again.

\frac{113}{12} -\frac{12+2}{3} =\frac{113}{12} -\frac{14}{3}, LCD=12

Make the denominators the same \frac{113}{12}-\frac{14*4}{3*4}=\frac{113}{12}-\frac{56}{12} =\frac{113-56}{12} =\frac{57}{12}=\frac{19}{4}=4\frac{3}{4}, the answer is D

8) 21\frac{7}{9}, improper fraction

\frac{21+19+7}{19} -6\frac{8}{19} =\frac{399+7}{19} -6\frac{8}{19} = \frac{406}{19} -6\frac{8}{19}

6\frac{8}{19} is an improper faction

\frac{406}{19}-\frac{6*19+8}{19}  =\frac{406}{19} -\frac{114+8}{19} =\frac{406}{19} -\frac{122}{19} =\frac{406-122}{19}=\frac{284}{19}=14\frac{18}{19}, the answer is B.

9) \frac{8}{9} -\frac{6}{9} =\frac{2}{9}, You're trying to see how much farther he ran on Monday compared to Wednesday, so Monday goes first.

10) \frac{3}{4} -\frac{1}{8} =\frac{5}{8}, You're trying to see how much more you need, so you need to subtract 1/8 (what you already have) and 3/4 to see how much you need left.

11) You're tyring to see how much she need all together, so you're looking for the sum, which is 12\frac{3}{8}, so the answer is C.

12) You're seeing how much he grew over the past years, so you'll be looking for the sum (addition) 1\frac{3}{4}+ 2\frac{2}{3} =4\frac{5}{12}

19) In this problen, Claude used some of his ribbon, which in turn decreased the amount he has left, so you are looking for the difference (In this case, what he has now, vs what he originally had.) 5\frac{1}{2} -4\frac{2}{3}= \frac{5}{6}, your answer is C.

20) Find the time it takes in all the routes by subtracting the time you leave to the time you get there, the answer is route four because it is 2 hours and 5 minutes.

Hope this helps, have a BLESSED and wonderful day, as well as a safe one!

-Cutiepatutie ☺❀❤

4 0
3 years ago
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