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3 years ago

Please help me ASAP!!

Mathematics

1 answer:

Sati [7]3 years ago

3 0

The answer is D, i.e. the system was solved via elimination

If you multiply the first equation by 5, the system becomes

$\left \{ {{-5x-10y=35} \atop {5x-6y=-3}} \right.$

If you sum the two equations, you get

$-16y = 32$

And so if you substitute the second equation of system A with this new equation, you'll get system B.

You might be interested in

Rational expressions? 5+2/p=17/p <br> (/ means a fraction symbol)

Lapatulllka [165]

$5+\frac{2}{p}=\frac{17}{p};\ p\neq0\\\\\frac{5p}{p}+\frac{2}{p}=\frac{17}{p}\\\\\frac{5p+2}{p}=\frac{17}{p}\iff5p+2=17\\\\5p=17-2\\\\5p=15\ /:5\\\\p=3$

5 0

3 years ago

Read 2 more answers

Ariana plans to use $260 less than three-fourths of savings to buy a car. If the purchase price of the car is 9,340, how much do

tangare [24]

She has $12,488 in savings

Step-by-step explanation:

Ariana plans to use $260 less than three-fourths of savings to buy a car.

If the purchase price of the car is 9,340, we need to find how much

she has in savings

To find the savings

Assume that she has $x in savings
Write an equation of x
Solve the equation to find x

∵ She has $x in savings

∵ She plans to use $260 less than three-fourths of savings

- Three-fourths means $\frac{3}{4}$ and less than means subtract

∴ She plans to use $\frac{3}{4}$ x - 26

∵ The purchase price of the car is 9,340

- Equate the expression of x by 9,340

∴ $\frac{3}{4}$ x - 26 = 9,340

Now let us solve the equation

∵ $\frac{3}{4}$ x - 26 = 9,340

- Add 26 to both sides

∴ $\frac{3}{4}$ x = 9,366

- Divide both sides by $\frac{3}{4}$

∴ x = $12,488

She has $12,488 in savings

Learn more:

You can learn more about word problems in brainly.com/question/3950386

#LearnwithBrainly

7 0

3 years ago

A polygon that has all sides the same measure and all angles the same measure is called what? A. Convex polygon B. Co

Schach [20]

<span>D. Regular polygon.

</span>A polygon that has all sides the same measure and all angles the same measure is called Regular polygon.

Hoped I helped!

8 0

4 years ago

Helpppp meeeee plzzzz

My name is Ann [436]

Answer:

Our eyes are sensitive to all electromagnet waves with a wavelength longer than infrared

Step-by-step explanation:

I hope this helps :) good luck!

4 0

3 years ago

Need helpppppp<br> plz and thank u

sdas [7]

5-1/10

Step-by-step explanation:

4-1/2+3/5=

9/2 + 3/5=

45/10+6/10=51/10=5-1/10

8 0

3 years ago