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3 years ago

2x+3y=6 x+2y=5 elimination

1 answer:

4 0

In this equation you can eliminate the x value
multiply the second equation by -2 and you get:
-2x - 2y = -10
when you add the two equations the x factors will cancel

2x + 3y = 6
- 2x - 2y = -10
---------------------
y = 16

you can find the x value by plugging the y value that you now know into one of the equations that you started off with.

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A bag contains 4 red marbles, 6 blue marbles and 7 green marbles. If three marbles are drawn out of the bag, what is the probabi

yawa3891 [41]

Answer:

Step-by-step explanation:

Total marble = 4+6+7 = 17

Number of green = 7

Prob(1st green) = 7/17

Now their are 6 green left and 16 marble

Prob(2nd green) = 6/16 = 3/8

Now their are 5 green left and 15 marble

Prob(3rd green) = 5/15 = 1/3

Prob(1st and 2nd and 3rd green) will be = 7/17 × 3/8 × 1/3

= 7/(17×8)

= 7/136

3 0

3 years ago

Add 52 inches and 8 feet and put your<br> answer in inches.

eimsori [14]

Answer:

148 inches

Step-by-step explanation:

8 • 12 = 96 + 52 = 148

A foot is 12 inches, and when converting to a smaller unit, you multiply. So, your answer is 148 inches.

Hope this helps! :)

8 0

3 years ago

Read 2 more answers

Which angles are complementary? I'm not sure if its B.

Angelina_Jolie [31]

Answer:

You are right, it's B

Step-by-step explanation:

Complementary angles are angles that add up to 90 degrees.

4 0

2 years ago

Read 2 more answers

A^2+B^2=C^2 B=2. 1 C=2.9

Scilla [17]

Are you being asked to solve for A? B?
$A^{2} + B ^{2} = C^{2}$
$A ^{2} +B ^{2} =(2.9) ^{2}$
$A ^{2} + B^{2} =8.41$

Solve for A:
$A^2=8.41-B^2$
Take a plus of minus square root
A= $\sqrt{-b^2+8.41}$
A= $- \sqrt{-b^2+8.41}$

Solve B:
$A^2+B^2=8.41$
$B^2=-A^2+8.41$
Take plus or minus square roots
$B= \sqrt{A^2+8.41}$
$B= -\sqrt{A^2+8.41}$

3 0

2 years ago

ABC is an obtuse triangle. Given that CB = 20, the measure of A = 30°, and the measure of B = 45°, which of the expressions list

Mariulka [41]

Answer:

option 3

Step-by-step explanation:

Using the Sine rule in Δ ABC, that is

$\frac{a}{sinA}$ = $\frac{b}{sinB}$ , that is