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noname [10]
3 years ago
13

What adds together to equal -7

Mathematics
2 answers:
777dan777 [17]3 years ago
8 0
-4+-3 I believe. Hopefuly that helps! Gl
Mashcka [7]3 years ago
5 0
It is possible to add two negative numbers and it'll equal a negative number
-4+-3
Or a negative and positive number
-14+7
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Solve the simultaneous equation:<br> 5 x + 2 y = 25 <br> 5 x − y = 10
Liono4ka [1.6K]

Answer:

(x, y) = (3, 5)

Step-by-step explanation:

5x+2y=25\\5x-y=10

Solving by elimination here again, there are 2 good options available. Either multiply the whole bottom equation by -1 to cancel the x, or by 2 to cancel the y. I'll do the latter:

5x+2y=25\\\\2(5x-y=10)\\10x-2y=20

Add from top to bottom:

\rightarrow (5x+10x)+(2y-2y)=25+20\\\rightarrow 15x=45\\\rightarrow x=3

Now, with the value of x, solve for y in either of the equations. I'll choose the second one here:

\rightarrow 5x-y=10\\\rightarrow 5(3)-y=10\\\rightarrow 15-y=10\\\rightarrow -y=-5\\\rightarrow y=5

(x, y) = (3, 5)

4 0
3 years ago
Read 2 more answers
Write a quadratic function h whose zeros are 5 and -7
marin [14]

Quadratic function whose zeros are 5 and -7 is x^2+2x-35=0

Step-by-step explanation:

Write a quadratic function h whose zeros are 5 and -7

If 5 and -7 are zeros of quadratic function then:

x=5 and x=-7

or x-5 = 0 and x+7=0

So, Finding quadratic equation:

(x-5)(x+7)=0\\x(x+7)-5(x+7)=0\\x^2+7x-5x-35=0\\x^2+2x-35=0

So, quadratic function whose zeros are 5 and -7 is x^2+2x-35=0

Keywords: Quadratic Function

Learn more about Quadratic Function at:

  • brainly.com/question/7361044
  • brainly.com/question/9328925
  • brainly.com/question/1357167

#learnwithBrainly

3 0
3 years ago
Carlotta asks 30 campers which outdoor activity they enjoy. Of these campers, 13 enjoyed swimming, 17 enjoy baseball, and 8 enjo
IgorC [24]
17+13=30-8=22
I did 17 plus 13 which equals 30, then I took 30 and subtracted 8 which equals 22!!!
8 0
4 years ago
Read 2 more answers
Which of the following ordered pair could represent the x-intercept of a function?
loris [4]

Answer:

(15,0)

Step-by-step explanation:

when we talk about x intercept, then you must remember that y will be zero

if you wanna find y intercept, the x will be zero

8 0
3 years ago
Turning off the water while brushing your teeth saves 379 centiliters of water. How many liters of water can you save if you tur
Effectus [21]
379 centiliters one time
 379x3=1,137 in 3 times
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3 years ago
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