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3 years ago

2x + 3y = -5 5x - y = -12 WHAT IS THE RESULT OF ADDING THESE TWO EQUATIONS?

2 answers:

6 0

You will have new classes to come at advanced stages of your studies that depend on these things. My advice to you is to love mathematics as much as possible.

Mrrafil [7]3 years ago

3 0

Answer:

x= −2 /7 y+ −17 /7

Step-by-step explanation:

well 3y and -y together make 2y. 2x and 5x make 7x. -5 and -12 make -17. then you get 7x+2y=-17. Let's solve for x.

7x+2y=−17

Step 1: Add -2y to both sides.

7x+2y+−2y=−17+−2y

7x=−2y−17

Step 2: Divide both sides by 7.

7 = −2y−17 /7

x= −2 /7 y+ −17 /7

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Ages of patients (in years) in a clinic: 19, 8, 21, 19 (round to the nearest whole ).

OLga [1]

I'm guessing you're looking for the mean or average? That would be the sum of all the ages divided by the numbers of people
So:
19+8+21+19=67
Divided by 4
67/4= 16.75
Rounded up you get 17

8 0

3 years ago

Tyson can type 49 words per minute. How long will it take him to type a 1000-word essay?

earnstyle [38]

Answer:

20.4minutes

Step-by-step explanation:

Duration= Number of words/Typing speed

Duration= 1000/ 49 per min

= 20.4minutes

Hope this helped you- have a good day bro cya)

8 0

2 years ago

Find the value of m. 13m = 273

balu736 [363]

Answer:

m = 21

Step-by-step explanation:

13m = 273

m = 273/13

m = 21

Hope this helps!

5 0

3 years ago

Read 2 more answers

What is that is the derivative of

katovenus [111]

Answer:

see explanation

Step-by-step explanation:

differentiate using the power rule.

$\frac{d}{dx}$ ( a $x^{n}$ ) = na $x^{n-1}$ , thus

$\frac{d}{dx}$ (x² - x + 3 ) = 2x - 1

x = 5 → 2(5) - 1 = 10 - 1 = 9

To find the value of x for minimum , equate $\frac{d}{dx}$ to zero

2x - 1 = 0 , then

2x = 1 and

x = $\frac{1}{2}$

3 0

3 years ago

Malory spent $5 on a 16oz bag of wheat thins. At this rate, how much does it cost for 10 oz of wheat thins?

igomit [66]

Answer:

$3.13

Step-by-step explanation:

Get the price per oz:

5/16 = 0.3125

Multiply that by the amount of ozs you are looking to buy:

0.3125 x 10 = 3.125

Round to get your answer

6 0

3 years ago