3 years ago

Solutions to 2-variable equations

Mathematics

2 answers:

Galina-37 [17]3 years ago

8 0

Answer:

B) only (-3 , 3)

Step-by-step explanation:

y = -3x - 6

(-4,4) y = -3 x (-4) - 6 = 12 - 6 = 6 .... incorrect

(-3,3) y = (-3) x (-3) - 6 = 9 - 6 = 3 ..... correct

fredd [130]3 years ago

5 0

Answer:

Step-by-step explanation:

To determine which point is a solution, substitute into the left side of the equation and if it is equal to the right side then it is a solution.

(- 4, 4 )

- 3(- 4) - 4 = 12 - 4 = 8 ≠ 6 ← Not a solution

(- 3, 3 )

- 3(- 3) - 3 = 9 - 3 = 6 ← Solution

Thus (- 3, 3 ) is the only solution → B

You might be interested in

Which shape does Not stack? need help plzzzzzz its #2

cluponka [151]

The shape that does not stack is the 3rd one the circle

4 0

3 years ago

Read 2 more answers

The square of 9 less than a number is 3 less than the number. What is the number?

dmitriy555 [2]

I think it’s maybe C

8 0

3 years ago

Two lengths are in ratio 7:8.if the first length is 273. What amount is the second length

Sergio [31]

Answer:

312

Step-by-step explanation:

Since the ratio is 7:8, mark it as 7x:8x.

Now, they said that the first length is 273. Solve the equation:

7x=273

x=39

Substitute it into 8x. 39*8=312. That's your answer.

PLS MARK BRANILIEST!!!

3 0

2 years ago

A cuboid has side lengths 3cm, 4cm and 7cm. A cylinder with a height double that of the longest side of the cuboid has the same

mart [117]

Step-by-step explanation:

Longest side of cuboid: 7cm

Height of cylinder:

2 × 7 = 14 cm

Volume of cuboid:

7x3x4=84 $cm^3$

Volume of cylinder:

$84=14\pi r^2 \\r=\sqrt{\frac{6}{\pi} } \ \ \ cm\\r=1.38 \ cm\\$

Surface area of the cylinder:

$\pi r^2 + 2 \pi r h$

$6+2\pi (\sqrt{\frac{6}{\pi} } ) (14)$

=128 cm^2

4 0

3 years ago

0.78 =? as a simplified fraction?

Murljashka [212]

Answer: 39/50

Step-by-step explanation:

8 0

3 years ago