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andrew-mc [135]
3 years ago
8

Someone help me please

Mathematics
1 answer:
Debora [2.8K]3 years ago
6 0

Answer: I think it is C.

Step-by-step explanation: Sorry if it is incorrect.

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P and Q are points on the line 3y - 4x = 12
Lorico [155]

Answer:

Step-by-step explanation:

Since the coordinates of P are (0, 1), this makes P the y-intercept of that line. The y-intercept exists where x = 0. And in the coordinate (0, 1), x does in fact equal 0.

Since the one coordinate given in Q is (?, 0), this means that Q is the x-intercept of the line. The x-intercept exists where y = 0. And in the coordinate (?, 0), y does in fact equal 0. So in order to solve for the x coordinate of Q, we plug in a 0 for y and solve for x:

3(0) - 4x = 12 and

-4x = 12 so

x = -3

6 0
3 years ago
Solve<br> -8x - 3y = -5<br> -2x + 7y = -9
k0ka [10]

Answer:

x = 1

y = - 1

Step-by-step explanation:

-8x - 3y = -5

-2x + 7y = -9  | × (-4)

-8x - 3y = - 5

8x - 28y = 36  +

________________

- 8x + 8x - 3y - 28y = - 5 + 36

- 31y = 31

31y = - 31

y = - 1

- 8x - 3(-1) = - 5

- 8x + 3 = - 5

- 8x = - 8

8x = 8

x = 1

6 0
3 years ago
Read 2 more answers
Bonjour je suis en 3 ème pouvez vous m'aider s'il vous plaît une voiture met 2 h 30 pour faire 200 km 1. Calculer sa vitesse moy
Lemur [1.5K]

Répondre:

Explication étape par étape:

Vitesse = Distance / Temps

Distance donnée = 200 km

Durée = 2 h 30

Convertir le temps en heures

Depuis 60 minutes = 1h

2 heures 30 minutes = 2+ (30/60)

2h30 = 2 + 1/2 hors

2 heures 30 minutes = 2,5 heures

Vitesse en km / h = 200 km / 2,5 h

Vitesse en km / h = 80 km / h

D'où sa vitesse moyenne en km / h est de 80 km / h

a) Distance = Vitesse * Temps

Vitesse donnée = 80 km / h

Durée = 3h15

Temps = 3 15/60 h

Durée = 3,25 h

Distance = 80 * 3,25

Distance parcourue en 3h15 = 260 km

b) Distance = Vitesse * Temps

Vitesse donnée = 80 km / h

Durée = 42 minutes

Durée = 42/60 h

Distance = 80 * 42/60

Distance = 3360/60

Distance = 56 km

Distance parcourue en 42 minutes = 56 km

c) Distance = Vitesse * Temps

Vitesse donnée = 80 km / h

Durée = 3 h 36 minutes

Temps = 3 36/60 h

Durée = 3,6 h

Distance = 80 * 3,6

Distance = 288 km

Distance parcourue en 3 h 36 min = 288 km

d) Distance donnée = 540 km

Vitesse = 80 km / h

Temps = Distance / Vitesse

Heure = 540/80

Temps = 6,75 heures

Par conséquent, le temps nécessaire pour parcourir 540 km est de 6,75 heures

7 0
3 years ago
How do you work out this math problem?? 3x+15-9=2(x+2)
vovangra [49]
3x + 15 - 9 = 2(x +2)
3x + 6 = 2(x +2)
3x + 6 = 2x + 4
3x + 6 - 2x = 2x - 2x + 4
x + 6 = 4
x + 6 -6 = 4 - 6
x = -2
8 0
4 years ago
Read 2 more answers
Which point on the graph shows the price of 6 cups of hot chocolate? Use the formula y=x÷4 to find y when x equals 6.
steposvetlana [31]

Answer:

The correct point would be D) (6, 1.5)

Step-by-step explanation:

To find the y value, put in 6 for x in the equation and simplify.

y = x÷4

y = 6÷4

y = 1.5

5 0
4 years ago
Read 2 more answers
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