Which ordered pairs in the form (x, y) are solutions to the equation 3x−4y=21?

Mathematics

2 answers:

leva [86]4 years ago

7 0

Answer:

1. (7, 0)

2. (11, 3)

4. (−1, −6)

These are correct

zmey [24]4 years ago

4 0

We must plugin values:
3(7)-4(0)=21, is CORRECT since 7•3 is 21 and -4•0 is 0
3(11)-4(3)=21 is CORRECT since 3•11=33 and -4•3=-12 so 33-12=21
3(-3)-4(3)=21 is INCORRECT since 3•-3 is -9 and -4•3 is -12, -9-12 is -21
3(-1)-4(-6)=21 is CORRECT since 3•-1 is -3 and -4•-6 is 24 and so 24-3=21

You might be interested in

Please Help!

kolbaska11 [484]

Answer:

The fully factored form is 3(x^2 - 7))

Step-by-step explanation:

The only thing you can do with this equation is take out a factor of 3. You cannot simplify the resulting parenthesis without using irrational numbers.

3 0

3 years ago

Read 2 more answers

PLZZ HELPPP!!!! I HAVE A EXAM TOMMOROW AND I HAVE TO FINSIH MY STUDY GUIDE..... AND I DONT KNOW THE ANSWERS PLZZZ HELP THE EXAM

Leona [35]

Just focus I'm sure you will pass your exam :)

6 0

2 years ago

A right cone has a radius of 3 feet and a slant height of 6 feet. What's the volume of the cone?

Sav [38]

V≈48.97ft³This is the answer.

8 0

3 years ago

Read 2 more answers

Nikki drew a rectangle with a perimeter of 18 units on a coordinate grid. Two of the vertices were (4, –3) and (–1, –3). What co

Talja [164]

Answer:

There are two possible solutions for the other two vertices of the rectangle:

(i) (4, 1), (-1, 1), (ii) (4, -7), (-1, -7)

Step-by-step explanation:

Geometrically speaking, the perimeter of a rectangle ( $p$ ) is:

$p = 2\cdot b + 2\cdot h$ (1)

Where:

$b$ - Base of the rectangle.

$h$ - Height of the rectangle.

Let suppose that the base of the rectangle is the line segment between (4, -3) and (-1, -3). The length of the base is calculated by Pythagorean Theorem:

$b = \sqrt{[(-1)-4]^{2}+[(-3)-(-3)]^{2}}$