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3 years ago

PLZ NEED HELP ASAP!!!

Mathematics

1 answer:

madam [21]3 years ago

4 0

Answer:

C and D

Step-by-step explanation:

I had this same problem on my quiz

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Solve each system by elimination.<br> -4x + 8y = -24<br> 7x - 5y = 24

White raven [17]

Answer:

The solution is the point (2,-2)

Step-by-step explanation:

we have

$-4x+8y=-24$ -----> equation A

$7x-5y=24$ -----> equation B

step 1

Multiply by 7 equation A both sides

$7(-4x+8y)=7(-24)$

$-28x+56y=-168$ -----> equation C

step 2

Multiply equation B by 4 both sides

$4(7x-5y)=4(24)$

$28x-20y=96$ -----> equation D

step 3

Adds equation C and equation D

$-28x+56y=-168\\28x-20y=96\\-----------\\56y-20y=-168+96\\36y=-72\\y=-2$

Find the value of x

substitute the value of y in any equation

equation A

$-4x+8(-2)=-24\\4x=-16+24\\4x=8\\x=2$

therefore

The solution is the point (2,-2)

6 0

3 years ago

James has three normal six-sided dice. he rolls all three of the dice at the same time and records the three numbers that land f

Charra [1.4K]

The answer is 1/36

The first one can be anything because we choose whatever it comes in first place.
$\frac{6}{6} \times \frac{1}{6} \times \frac{1}{6} = \frac{6}{216} = \frac{1}{36}$

5 0

3 years ago

Which is not a rational number?

mrs_skeptik [129]

Answer:

Answer: A real number that is not rational is called irrational. Irrational numbers include √2, π, e, and φ. The decimal expansion of an irrational number continues without repeating.

7 0

2 years ago

Solve:⬆️ plzzz<br> 6th grade math

Rainbow [258]

Answer:

K=26

Step-by-step explanation: