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2 years ago

WILL GIVE BRAINEST TO CORRECT ANSWER (50 points)

Mathematics

2 answers:

LuckyWell [14K]2 years ago

6 0

Answer:

The system of equations has infinite solutions. True for all y and x.

Given equations:

x + 4y = 0

20y = - 5x

Make x the subject for equation 1:

x + 4y = 0

x = -4y

Plug x as -4y in second equation:

20y = - 5x

20y = - 5(-4y)

20y = 20y

0 = 0

L.H.S = R.H.S

True for all y.

Therefore true for all x.

KatRina [158]2 years ago

5 0

Answer:

x=1 y=(-1/2) putting those in 20x1=20 so 20= then you put -1/2 and multiply it by the -5 that would be your answer

Step-by-step explanation:

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Cloud [144]

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3 years ago

Stephan monthly pay stub indicates that his monthly gross income is 3800 however 800 is withheld for income and social security

Stels [109]

Step-by-step explanation:

3800 is the general amount, but before he can touch it, 800 and 200 are taken away from it for the described purposes.

so, what is left is

3800 - 800 - 200 = 2800

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1 year ago

Is the ordered pair a solution of y ≥ 2x − 5? a. (3, 1) b. (1, −4)

Deffense [45]

Answer:

a. Yes

b. No

Step-by-step explanation:

To find if an ordered pair is a solution to the inequality, substitute its x and y values for the x and y in the inequality and solve. If the equation is true, then it is a solution. If it is not, then it is not a solution.

1) First, substitute the x and y values of (3, 1) into the inequality. So, substitute 3 for x and 1 for y:

$1 \geq 2(3)-5\\1\geq 6-5\\1\geq 1$

1 is greater than or equal to 1, so (3,1) is a solution.

2) Second, do the same with the point (1, -4). Substitute 1 for x and -4 for y:

$-4\geq 2(1)-5\\\\-4\geq 2-5\\-4\geq -3$

However, -4 is not greater than or equal to -3, thus (1, -4) is not a solution.

4 0

2 years ago

Anjali was keeping track of how far she walked. She walked 1 1/10 miles on Monday, 4 4/5 miles on Wednesday, and 2 1/4 on Friday

Bumek [7]

Answer:

8.15 miles

Step-by-step explanation:

Monday: 1 1/10 miles = 1.1

Multiply by 10 to get to 100

Wednesday: 4 4/5 miles = 4.8

Multiply by 20 to get to 100

Friday: 2 1/4 miles = 2.25

Multiply by 25 to get to 100

1.1 + 4.8 + 2.25 = 8.15 miles

8 0

1 year ago

Read 2 more answers

How to solve 167<6+7(2-7r)

Leona [35]

167<6+7(2-7r)167<6+14-49r
167-6-14<-48r
147<-49 r
r >-3

8 0

2 years ago