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nikitadnepr [17]
2 years ago
10

which ordered pairs in the form (x, y) are solutions to the equation 3x−4y=21 ? Select each correct answer. (−1, −6) (−3, 3) (11

, 3) (7, 0)
Mathematics
2 answers:
valkas [14]2 years ago
6 0

Answer:

wut he said is correct i verified it

Step-by-step explanation:

Valentin [98]2 years ago
3 0

Answer:

see explanation

Step-by-step explanation:

To determine which ordered pairs are solutions to the equation

Substitute the x and y values into the left side of the equation and if equal to the right side then they are a solution.

(- 1, - 6)

3(- 1) - 4(- 6) = - 3 + 24 = 21 = right side ← thus a solution

(- 3, 3)

3(- 3) - 4(3) = - 9 - 12 = - 21 ≠ 21 ← not a solution

(11, 3)

3(11) - 4(3) = 33 - 12 = 21 = right side ← thus a solution

(7, 0)

3(7) - 4(0) = 21 - 0 = 21 = right side ← thus a solution

The ordered pairs (- 1, - 6), (11, 3), (7, 0) are solutions to the equation

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Carly and James share some money in the ratio 5 : 3
GalinKa [24]

Answer:

£52

Step-by-step explanation:

let Carly shared is equal to 5x and it is equal to £70

then x is equal to 14

so James shared = 3x i.e. £52

7 0
2 years ago
Read 2 more answers
Decide, without calculation, if each of the integrals below are positive, negative, or zero. Let D be the region inside the unit
Schach [20]

The integrals over B and T will be positive. Keeping y fixed, xe^x is strictly increasing over D as x increases, so the integrals over x (i.e. the bottom/top left quadrants of D) is negative but the integrals over x>0 are *more* positive.

The integrals over R and L are zero. If we take f(x,y)=xe^x, then f(x,-y)=f(x,y), which is to say f is symmetric across the x-axis. For the same reason, the integral over all of D is also zero.

4 0
2 years ago
A small country had a population of 8.4 x 10^8 in 2010. Since then, the original population has doubled, and an additional 3.7 x
Mamont248 [21]

I'm not 100% sure because it is rare to ask about adding scientific notation but I would answer it like this:

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4 0
2 years ago
The number of hours walked varies inversely with the speed of the walker. if it takes sam 12 hours to complete his walking goal
Effectus [21]
We let k be the proportionality constant for the relationship between number of hours, h and speed of the walker, s. 

                        h = k/s
Substituting the known values,
                        12 = k/5
                          k = 60

For the second scenario,
                          h = k/s
Substituting the calculated value for k and the given value for speed,
                          h = (60)(3 miles/hour)
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Therefore, it will take 20 hours to walk with a speed of 3 miles per hour. 
7 0
2 years ago
A middle school took all of its 6th grade students on a field trip to see a play at a theater that has 2780 seats. The students
Over [174]

Answer:

1242 6th graders went on the trip.

Step-by-step explanation:

From the information given, you know that the theater has 2760 seats and that the students filled 45% of the seats, so to find the quantity of 6th graders that went on the trip, you have to calculate 45% of 2760:

2760*45%=1242

According to this, the answer is that 1242 6th graders went on the trip.

5 0
1 year ago
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