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Sidana [21]
3 years ago
7

Which ordered pairs are on the line ​ 3x−4y=9 ​? Select each correct answer.

Mathematics
1 answer:
Sergeu [11.5K]3 years ago
6 0

 

\displaystyle\\a)~~~3\cdot\left(\frac{2}{3}\right)-4\cdot\left(-\frac{7}{4}\right)=\frac{3\cdot2}{3}+\frac{4\cdot7}{4}=2+7=9~~~\text{(Correct)}\\\\\\b)~~~3\cdot\left(-5\right)-4\cdot\left(-6\right)=-15+24=9~~~\text{(Correct)}\\\\\\c)~~~3\cdot\left(1\right)-4\cdot\left(-\frac{3}{2}\right)=3+\frac{4\cdot3}{2}=3+2\cdot3=3+6=9~~~\text{(Correct)}\\\\\\d)~~~3\cdot\left(-1\right)-4\cdot\left(3\right)=3-12=-9~~~\text{(Wrong)}



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Solve −4(x + 10) − 6 = −3(x − 2). (1 point)
AURORKA [14]

Hey there!!

Given equation :

... -4 ( x + 10 ) - 6 = -3 ( x - 2 )

Using the distributive property :

... -4x - 40 - 6 = -3x + 6

Combining like terms :

... -4x - 46 = -3x + 6

Adding 46 on both sides :

... -4x = -3x + 52

Adding 3x on both sides :

... -x = 52

... x = -52

Hope helps!

8 0
3 years ago
The cup, on the 9th hole of a golf course, is located, dead center, in the middle of a circular green, which is 35 feet in radiu
ale4655 [162]

Answer:

± 27.33 ft

Step-by-step explanation:

For the given problem, we can estimate the initial and final coordinates of the line of the ball path as (-40,-50) and (0,0). Therefore, the slope is:

(-50-0)/(-40-0) = 50/40 = 1.25

Similarly, we can estimate the slope of a perpendicular line to the line of the ball path as: -1*(1/1.25) = -0.8.

Therefore, using (0,0) and the slope -0.8, the equation of the perpendicular line is: -0.8 = (y-0)/(x-0);

-0.8 = y/x

y = -0.8x

Furthermore, we are given the circle radius as 35 ft and we can use the distance formula to find the two points 35 ft far from the origin:

35^2 = x^2 + y^2

y = -0.8x

35^2 = x^2 + (-0.8x)^2

1225 = (x^2 + 0.64x^2)

1225 = 1.64x^2

x^2 = 1225/1.64 = 746.95

x = sqrt(746.95) = ± 27.33 ft

5 0
4 years ago
The inequality 7-2/3 < x-8 is equivalent to
inn [45]

X>43/3

Or X>29/3

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5 0
3 years ago
Help please im lost and not good in math
Damm [24]
Answers: a = 49
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c = 105
8 0
3 years ago
Read 2 more answers
Jerome, Kevin, and Seth shared a submarine sandwich.
Elanso [62]
Seth at 1 - 1/2 - 1/3 = 1/6 of the sandwich.

Therefore the ratio is:

1/2 : 1/3 : 1/6

Multiply everything by 6:

3: 2: 1 D
6 0
3 years ago
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