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Kaylis [27]
2 years ago
15

Solve the simultaneous equations by substitution x − y = 8, x + 4y = 13

Mathematics
1 answer:
Evgesh-ka [11]2 years ago
4 0

Answer:

x = 9; y = 1

Step-by-step explanation:

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Please help me answer this. I think that for the first one the answer is A, but I am not sure. There are two parts to the questi
Anika [276]
Vector PQ=(7-5, 3-4)=(2, -1).  4RS=4 \cdot (4-8, 1-6) = 4 \cdot (-4, -5) = (-16, -20).  So the sum is (-14, -21).

For the second, the magnitude is the square root of the sum of the squares of the components.  This is equal to \sqrt{(-14)^2+(-21)^2} = \sqrt{637}=7\sqrt{13}.
4 0
3 years ago
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What value of x is in the solution set of 2(4+2x)>5x+5
Serggg [28]

Answer:

x < 3

Step-by-step explanation:

2(4+2x)>5x+5

Distribute

8 +4x > 5x+5

Subtract 4x from each side

8 +4x-4x > 5x-4x+5

8 > x+5

Subtract 5 from each side

8-5 > x+5-5

3 > x

X must be less than 3

7 0
3 years ago
Express 0.32 as a fraction
jok3333 [9.3K]
The answer is (32/100)-(8/25 )
6 0
3 years ago
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Help me on 5.<br> Answer please
Ket [755]

Answer:

5/8

Step-by-step explanation:

1 - 3/8

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5 0
3 years ago
Greg is volunteering at a track meet. He is in charge of providing the bottled water. Greg knows these facts:
GuDViN [60]

Answer: There are 819 fewer number of cases of water bottle that all athlete, all coaches and all judges will get.

Step-by-step explanation:

Since we have given that

Number of days the meeting is going on = 3 days

Number of athletes = 117

Number of coaches = 7

Number of judges = 4

Number of bottles given to each athlete each day = 4

Total number of bottles total athlete for 3 days will get is given by

117\times 4\times 3\\\\=1404

Number of bottles given to each coach each day = 3

Total number of bottles total coach for 3 days will get is given by

7\times 3\times 3\\\\=63

Number of bottles given to each judge each day = 2

Total number of bottles total judge for 3 days will get is given by

4\times 3\times 2\\\\=24

Number of cases of water bottle is given to athletes is given by

\frac{1404}{24}

Number of cases of water bottle is given to coaches is given by

\frac{63}{24}

Number of cases of water bottle is given to judges is given by

\frac{24}{24}

We need to find the fewer number of cases that all athlete , all coaches and all judges will get

\text{L.C.M. of }\frac{1404}{24},\frac{63}{24},\frac{24}{24}\\\\=\frac{L.C.M.\ of\ 1404,63,24}{H.C.F.\ of\ 24,24,24}\\\\=\frac{19656}{24}\\\\=819

Hence, there are 819 fewer number of cases of water bottle that all athlete, all coaches and all judges will get.

5 0
2 years ago
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