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Reika [66]
3 years ago
9

Tell whether each equation represents a direct variation. if so, identify the constant of variation.

Mathematics
1 answer:
Ivenika [448]3 years ago
7 0

Answer:

1. Not a direct variation

2. Direct variation (constant= -4)

3. Direct variation  (constant= -1)

Step-by-step explanation:

A direct variation is a function of the type

y = k*x, where k can be any real number

First case

1. y=4x+9  

The term 9 interferes with the expression (it creates an offset for the value)

2. 2y=-8x  

It is a direct variation, y = -4x

3. x+y=0

It is a direct variation, y = -x

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(b+a)^2 ÷4 ; use a=-2, and b=4
marta [7]

Answer:

1

Step-by-step explanation:

(b + a)² ÷ 4 when a = -2 and b = 4

~Substitute

(4 + (-2))² ÷ 4

~Simplify

2² ÷ 4

4 ÷ 4

1

Best of Luck!

7 0
3 years ago
Read 2 more answers
If 4 batches of muffins and 5 loaves of bread are baked, how much flour will be left? Give your answer in kilograms. b. The rema
DerKrebs [107]

This question is Incomplete

Complete Question

The bakery bought 4 bags of flour containing 3.5 kg each. 0.475 kg of flour is needed to make a batch of muffins, and 0.65 kg is needed to make a loaf of bread.

a. If 4 batches of muffins and 5 loaves of bread are baked, how much flour will be left? Give your answer in kilograms.

b. The remaining flour is stored in bins that hold 3 kg each. How many bins will be needed to store the flour? Explain your answer.

Answer:

a. 8.85kg of flour is left.

b. 2.95 bins

Step-by-step explanation:

The bakery bought 4 bags of flour containing 3.5 kg each.

Total kg of flour the Bakery bought : 4 × 3.5kg

= 14 kg of flour

0.475 kg of flour is needed to make a batch of muffins

1 batch of muffin = 0.475kg of flour

4 batches of muffins = ???

Cross Multiply

4 batches × 0.475kg/ 1 batch

= 1.9kg of flour was used.

0.65 kg is needed to make a loaf of bread.

1 loaf of bread = 0.65kg of flour

5 loaves of bread = ???

Cross Multiply

5 loaves × 0.65/1 loaf

= 3.25 kg of flour.

Total kg of flour used = 1.9kg + 3.25kg

= 5.15kg of flour.

The amount of flour left = 14kg - 5.15kg

= 8.85kg of flour is left.

b. The remaining flour is stored in bins that hold 3 kg each. How many bins will be needed to store the flour?

3 kg of flour is stored = 1 bin

8.85 kg of flour is stored = x

Cross Multiply

3kg × x = 8.85kg × 1 bin

x = 8.85 kg × 1 bin/3kg

x = 2.95 bins

7 0
4 years ago
Quick help please i can’t
VladimirAG [237]

Dont say you can't! I believe in youu!


6 0
3 years ago
What is the additive inverse of the complex number 9-412<br> -9-41<br> -9 +41<br> 9 - 41<br> 9 + 41
Studentka2010 [4]

Additive inverse means the sum should be 0

so all you gotta do is multiply the complex number by -1

(the question isn't clear so I can't state the option)

5 0
4 years ago
A circular piece of glass has a radius of 0.8 meters. The glass sells for $4.60 per m2.
Aleksandr-060686 [28]

A=pi r^2

then use your rate of $4.60/m^2 and multiply that by your area.

A = 3.14 (.8^2)

Cost = 2.01 m^2 $4.60/m^2 = $9.24

So your answer would be B

plz mark me as brainliest :)

6 0
4 years ago
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