Mathematics, 02.11.2020 07:00 eden1017

Will award BRAINLIEST, GUARANTEED

please solve this system of equations:
-4x-5y=-19
-9x-7y=-13

Answers: 1

Show answers

Answers

Answer from: daevinepetersopa86on

hi there!! :)

the answer should be (-4,5) or x = -4, y = 5

Step-by-step explanation:

1. You'd want to solve this system using elimination because both equations are written in standard form so it would be easiest. To do this, you need to choose which variable you want to eliminate. I'm going to eliminate the Y viariables.

so, you'd need to first find the LCM of the two variables. The LCM for 5 and 7 would be 35. So, you would multiply the entire top equation by -7 and the entire bottom equation by 5 so that your y viariables will end up being -45y and 45y, therefore cancelling each other out.

2. Completing step 1 will leave you with the following system:

28x = 133

-45x = -65

So, next we need to combine these two equations through adding like variables. this will mean we need to add 28x + -45x and 133 + -65

This will leave us with -17x = 68

3. Now, we need to isolate the x variable to solve for x. This is done through dividing both sides of the equation by -17. This will leave us with x = -4.

4. Now, we need to find y. To do this, you would pick one of the equations and solve it using the x value we just found. So, using this on the top equation, we would need to solve -4(-4) - 5y = -19.

First, multiply what's in the parentheses. this leaves us with 16 - 5y = -19. Now, we need to begin isolating the y value. This means subtracting the 16 from both sides of the equation, leaving us with -5y = -35. Now, to finish off, we would complete isolating the y variable through dividing both sides by -5. This will leave us with y = 7.

5. This all means that the answer should be (-4,5) or x = -4, y = 5

Hope this helps!!

Answer from: Quest

The answer is b) 32 your welcome

Answer from: Quest

First, think of what you know. you know that the number t the end of the equation will need to be subtracted because it is the money he lost from buying the lawn mower. and your first two weeks have negative profit, so that tells you that c and d are wrong. now you can plug any of the weeks into a and b to see which one works. i'll start with plugging week 1 into a. $y = 60(1) - 90 \\ y = 60 - 90 \\ y = - 30$ this isn't right because it says your answer for week one should be -90.so now we need to try the same thing with b. $y = 60(1) - 150 \\ y = 60 - 150 \\ y = - 90$ this one got you the right answer, (sometimes if you only check with one of the weeks multiple will work so you need to check with more of the weeks, but it worked out fine here)this means that b is the correct answer.let me know if you need more clarification. i hope this : )

Another question on Mathematics

Mathematics, 21.06.2019 19:40

Graph y = -|x| + 2. click on the graph until the correct one appears.

Answers: 3

Answer

Mathematics, 22.06.2019 00:10

Examine the paragraph proof. which theorem does it offer proof for? prove jnm – nmi according to the given information in the image. jk | hi while jnm and lnk are vertical angles. jnm and lnk are congruent by the vertical angles theorem. because lnk and nmi are corresponding angles, they are congruent according to the corresponding angles theorem. finally, jnm is congruent to nmi by the transitive property of equality alternate interior angles theorem gorresponding angle theorem vertical angle theorem o same side interior angles theorem

Answers: 2

Answer

Mathematics, 22.06.2019 00:20

What is the value for this expression? 2e-5

Answers: 1

Answer

Mathematics, 22.06.2019 04:40

The equations 2x-5y = -5 11x-5y = 15 9x+ 5y = 5 and 14x+ 5y = -5 are shown on the graph below. which system of equations has a solution of approximately (-0.6. 0.8)?

Answers: 3

Answer

You know the right answer?

Will award BRAINLIEST, GUARANTEED

please solve this system of equations:
-4x-5y=-...

Questions