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mr_godi [17]
3 years ago
6

Solve each system using substitution or elimination. Show all required work. Y=-5x^2+2x-3 Y=-3x-3

Mathematics
1 answer:
zubka84 [21]3 years ago
8 0

Step-by-step explanation:

y = -5x² + 2x - 3 and y = -3x - 3.

=> -5x² + 2x - 3 = -3x - 3

=> 5x² - 5x = 0

=> 5x(x - 1) = 0

=> x = 0 or x = 1.

When x = 0, y = -3(0) - 3 = -3.

When x = 1, y = -3(1) - 3 = -6.

The solutions are (0,-3) and (1,-6).

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If 2L of solution needs to be administered through an IV over 24hours, then how many mililitres of solution needs to be provided
kow [346]

Answer:

83.33 milliliters

Step by step explanation:

2L = 2000 ml   Change the liters to milliliters first

2000 ml : 24 hours

x ml : 1 hour

Next you cross multiply : 2000 × 1 hour = 2000 and 24 × x = 24x

Then you divide:

\frac{24x}{24} : \frac{2000}{24}

x : 83.3333333...

When this is rounded off it is equal to 83.33

HOPE THIS HELPED

7 0
3 years ago
JUST REPOSTING THIS QUESTION UNTIL I GET A CORRECT ANSWER (Cause nobody will help me) XD
Nezavi [6.7K]

Answer:

x = 15

Step-by-step explanation:

Simplifying

3x + (8x + 15) = 180

Reorder the terms:

3x + (15 + 8x) = 180

Remove parenthesis around (15 + 8x)

3x + 15 + 8x = 180

Reorder the terms:

15 + 3x + 8x = 180

Combine like terms: 3x + 8x = 11x

15 + 11x = 180

Solving

15 + 11x = 180

Solving for variable 'x'.

Move all terms containing x to the left, all other terms to the right.

Add '-15' to each side of the equation.

15 + -15 + 11x = 180 + -15

Combine like terms: 15 + -15 = 0

0 + 11x = 180 + -15

11x = 180 + -15

Combine like terms: 180 + -15 = 165

11x = 165

Divide each side by '11'.

x = 15

Simplifying

x = 15

5 0
2 years ago
Read 2 more answers
Mary decreased her time for the mile walk from 30 minutes to 24 minutes. What was the percent of decrease?
I am Lyosha [343]

Answer:

20%

Step-by-step explanation:

Formula:

((GreaterTime-LeastTime)/Greatertime)x100= Percentage of Decrease.

((30-24)/30)*100=percent of decrease.

(6/30)*100=percent of decrease.

0.2*100= percent of decrease.

20%.

Hope this helps you :D

6 0
3 years ago
Cody tells Gordon that he is thinking of a number between 10 and 30 the clues he gave are (a) that the sum of the digits is 9 an
Eva8 [605]
27. You can do this by thinking of all the pairs that add up to 9( 1 and 8, 2 and 7, 3 and 6, 4 and 5) and arrange them to get numbers.
7 0
3 years ago
If x= -3, then x2 -7x 10 equals
NikAS [45]
(-3)^2 - 7(-3) × 10 = 219
5 0
3 years ago
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