Solve the system of equations by the addition method.

Answers

Answer 1

[tex]\left \{ {{\frac{x}{2}-y=7 } \atop {-\frac{x}{7}+\frac{2y}{7}= -2 }} \right. <=>\left \{ {{\frac{x}{2}.2-2y=2.7} \atop {-\frac{x}{7}.7+\frac{2y}{7}.7= -2.7}} \right. <=>\left \{ {{x-2y=14} \atop {-x+2y=-14}} \right. <=>\left \{ {{0x=0} \atop {y={\frac{x}{2}-7}} \right.[/tex]

ANSWER: B

ok done. Thank to me :>

Answer 2

Integer solution

x= 2n, y=n-7, nEZ

real solution or you can use inverse operation to have addition

y= x/2-7 y=x[multiplied by] 2+7

oh and for the first one the choice is A the second one im sorry im not sure

Related Questions

Nic ran for two hours. If he ran one mile every (1)/(6) of an hour, how many miles did Nic run? Which model would help solve this problem?

Answers

Answer:

he ran 12 miles. the option you have chosen is the best choice.

Step-by-step explanation:

hope this helps

He would have ran 12 mile

PLS HELP ASAP!!! I WILL GIVE BRAINLIEST!!
Joan represents the height at which a sea gull is flying at +4 feet and the depth at which a fish is swimming at −3 feet on a number line, where 0 represents the surface of the water. Which of these explains whether the sea gull or the fish is closer to the surface of the water? The fish is closer to the surface of the water because |+4| = 4 and |−3| = 3, and 3 < 4. The fish is closer to the surface of the water because |+4| = 4 and − |−3| = −3, and −3 < 4. The sea gull is closer to the surface of the water because |+4| = −4 and |−3| = −3, and −3 > −4. The sea gull is closer to the surface of the water because |+4| = 4 and − |−3| = 3, and 4 > 3.

Answers

Answer:

The fish is closer to the surface of the water because |+4| = 4 and |−3| = 3, and 3 < 4.

Step-by-step explanation:

Please help! I don’t get this!

Answers

The correct answer is B!

Answer:

The answer is B) a = -7/16

Step-by-step explanation:

3/4 + 4a/7 = 6a/7 + 7/8

By transposing, we get

=> 3/4 - 7/8 = 6a/7 - 4a/7

=> (by taking LCM) 6-7/8 = 6a-4a/7

=> -1/8 = 2a/7

=> -7 = 16a (by cross multiplication)

=> a = -7/16

Can someone explain to me what this means, I can't quite understand it.

Answers

Answer: 214 You added up all of those and devided the mean( all 4)

PLZ HELP AS SOON AS POSSIBLE!!!!!!!!! WILL GIVE LIKE, 5 STARS, & BRAINLIEST; THE WHOLE SHEBANG;
Part 1
Meg is a veterinarian. She found that 5 or, 50% of the dogs she saw this week were boxers. Steve is also a veterinarian. He found that 50% out of the 2 dogs he saw this week were boxers. Does each person need to find the part, the whole, or the percent?
Question content area bottom
Part 1
Meg needs to find the
▼
percent.
part.
whole.
Part 2
Steve needs to find the
▼
percent.
part.
whole.

Answers

Answer:

Part 1: meg needs to find the whole

Part 2: steve needs to fing the part

hope this helped!

Find the total cost with tip.
Mr .Smith goes to eat for his son's birthday. The total bill is $56.50. If Mr. Smith leaves a 22% tip. What is the tip amount? What is the total cost of the meal with tip included?

Answers

Finding the tip amount:
(56.5)(22)=1,243
1,243/100=12.43
The tip amount is $12.43.
Finding the total cost:
56.50+12.43=68.93
The total cost of the meal with tip included is $68.93.

56.50 * .22 = 12.43
56.50 + 12.43 = $68.93

What is [tex]rs^{3}[/tex] divided by 8-2r if r=8 and s=3?

Answers

Answer:

-2304

Step-by-step explanation:

rs^3=(8)(3)^3=13824 r*2=8*2=16 8-16=-8

13824/-6=-2304

I think the Answer is -2304
I hope I helped :3

Which symbol makes the number sentence true?

A. <
B. >
C. =

Answers

Answer:

C: =

Step-by-step explanation:

-10/4 = -2.5

so C they're equal

Answer:

it is c

Step-by-step explanation:

they both are equal 10/4 =2.5 aswell

pls give me brainliest

Compare the values of each 7 in the number 771,548. Can you please tell the the step by step explanation? Thanks!

Answers

Answer:

700,000 >70,000

Step-by-step explanation:

To break it down:

the value of each number is the following:

first 7: 700,000 , second 7: 70,000, 1: 1000, 5: 500, 4: 40, 8:8

Since we find the values of each seven we know compare

That is how we get to 700,00>70,000

700,000> 70,000 hope this helps

Giving Brainliest if correct! :D

A proportional relationship between the number of pounds of cabbage (x) and the price in dollars (y) is graphed, and the ordered pair (5, 3) is on the graphed line.

Part A: What is the price of 1 pound of cabbage? Show your work. (8 points)

Part B: What does the ordered pair (10, 6) on the graph represent? Explain in words. (2 points)

Answers

about .60 per pound- 3/5=price per pound
the ordered pair represents 10 pounds of cabbage for 6 dollars

Answer:

Part A: (1, 0.6)

Part B: 10 pounds of cabbage is 6 dollars

Step-by-step explanation:

Part A: 3 divided by 5= 0.6

Part B: I already explained part b

Can someone help me with these?

Answers

Answer:

1:100 and 1:14

Step-by-step explanation:

Answer:

It’s 1:100 and 1:14

Wish its the right Answer

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