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3 years ago

X2 + 45x = -200 using the quadratic formula

Mathematics

1 answer:

Ivan3 years ago

7 0

Answer:

x=−5 or x=−40

Step-by-step explanation:

Step 1: Subtract -200 from both sides.

Step 2: Factor left side of equation.

Step 3: Set factors equal to 0.

HOPE IT HELPS:)

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Clare volunteers at a local library during the summer. Her work includes putting labels on 750 books. How many minutes will she

Lubov Fominskaja [6]

Answer:

75 minutes

Step-by-step explanation:

Assuming that Clare will not take a break throughout the session

10 books=1 minute

750 books= x minutes

Cross multiplying to find the value of x

10x books=750 books minutes

Making x the subject

x=750 books minutes/(10 books)

x=75 minutes

This translates to 1 hours and 15 minutes

Therefore, Clare will require 75 minutes

5 0

3 years ago

In a bag of keys, there are 12 silver keys, 5 black keys, 11 copper keys, and 2 painted keys of various colors. One key is drawn

umka2103 [35]

The total number of keys equals:
12 + 5 + 11 + 2 = 30 keys

The probability to pick a sliver key is:
12/30 = 2/5

The probability to pick a copper key is:
11/30

Hope that helps

7 0

3 years ago

Explain how the equation 312.50=a+0.25a

jarptica [38.1K]

Answer:

Step-by-step explanation:

312.50= a+0.25a

We need to combine like terms a=1. All variables without a value equal 1.

a+0.25a= 1.25a

312.50= 1.25a

Divide both sides by 1.25, since 1.25 is being multiplied by a.

a= 250

7 0

2 years ago

Do the ratios 9/6 and 2/1 form a proportion

valina [46]

Answer:

This is not a proportion

Step-by-step explanation:

Set up a proportion

9/6 = 2/1

Check with cross products

9*1 = 6*2

9 = 12

This is not true so they are not proportional

3 0

2 years ago

He quadrilateral is a rectangle. Find

kumpel [21]

Answer:

You have to set them equal to each other and then solve for x

Step-by-step explanation:

4 0

2 years ago

Read 2 more answers