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Kaylis [27]
4 years ago
14

Please help. I’ll mark you as brainliest if correct! Thank you

Mathematics
1 answer:
Olin [163]4 years ago
5 0

Answer:

8 pounds of cheaper candy,

17.5 pounds of expensive candy

Step-by-step explanation:

Let's define some variables. Let's say the amount of pounds of candy that sells for $2.20/lb is x, and the $7.30 is y. Now we can write some equations!

x + y = 25.5

\frac{2.2x + 7.3y}{25.5} = 5.7

We can start substitution. We can say that x = 25.5 - y. Plugging this into our second equation, we get:

y = 17.5

Plugging this in, we find that:

x = 8.

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Select the graph that matches the function y=3x+7
OlgaM077 [116]
This is the graph that matches that

5 0
4 years ago
4(x-3)=9 what is the first step
gogolik [260]

Answer:

x= 5.25

Step-by-step explanation:

You have to get x alone, so do inverse operations.

(Basically, reverse what it is)

4(x-3)=9

divide 4 by both sides to get rid of 4 on left side

9/4 = 2.25

(x-3) = 2.25

Now add 3 to both sides, to get x alone

2.25 + 3 = 5.25

x=5.25

Check work

4(5.25-3) = 9

4(2.25) = 9

9=9

3 0
3 years ago
Calculate the area and volume of the ball of radius: a) r = 4 cm; b) √3 cm
Contact [7]

Answer:

a)

The area of the sphere with radius 4cm is 200.96cm²

The volume of the sphere with radius 4cm is 267.75 cm³

b)

The area of the sphere with radius √3 cm is 37.68cm²

The volume of the sphere with radius √3 cm is 21.756 cm³

Step-by-step explanation:

a)

To calculate the area of a sphere we have to use the following formula:

A = area

r = radius  = 4cm

π = 3.14

A = 4πr²

we replace with the known values

A = 4 * 3.14 * (4cm)²

A = 12.56 * 16cm²

A = 200.96cm²

The area of the sphere with radius 4cm is 200.96cm²

To calculate the volume of a sphere we have to use the following formula:

V = volume

r = radius  = 4cm

π = 3.14

V = ⁴⁄₃πr³

we replace with the known values

V = ⁴⁄₃ * 3.14 * (4cm)³

V = 4.187 * 64 cm³

V = 267.75 cm³

The volume of the sphere with radius 4cm is 267.75 cm³

b)

To calculate the area of a sphere we have to use the following formula:

A = area

r = radius  = √3 cm

π = 3.14

A = 4πr²

we replace with the known values

A = 4 * 3.14 * (√3 cm )²

A = 12.56 * 3cm²

A = 37.68cm²

The area of the sphere with radius √3 cm is 37.68cm²

To calculate the volume of a sphere we have to use the following formula:

V = volume

r = radius  = √3 cm

π = 3.14

V = ⁴⁄₃πr³

we replace with the known values

V = ⁴⁄₃ * 3.14 * (√3 cm)³

V = 4.187 * 3√3 cm³

V = 21.756 cm³

The volume of the sphere with radius √3 cm is 21.756 cm³

5 0
3 years ago
What is an equation of the line that passes through the point (-1, 4) and is parallel
vesna_86 [32]

Answer:

The answer is

<h2>y + 2x = 2</h2>

Step-by-step explanation:

Equation of a line is y = mx + c

where

m is the slope

c is the y intercept

To find the equation of the parallel line we must first find the slope of the original line

The original line is 2x + y = 1

We must first write the equation in the general form above

That's

y = - 2x + 1

Comparing with the general equation above

Slope = - 2

Since the lines are parallel their slope are also the same

Slope of parallel line = - 2

So the equation of the line using point

( - 1 , 4) and slope - 2 is

<h3>y - 4 =  - 2(x + 1) \\ y - 4 =  - 2x - 2 \\ y + 2x =  - 2 + 4</h3>

We have the final answer as

<h3>y + 2x = 2</h3>

Hope this helps you

3 0
3 years ago
the PTA makes a $5.00 profit on each school sweatshirt sell. If they made a profit of $2,170.00, how many sweatshirts did they s
Helga [31]
It is 434 because 2170 ÷5 equals 434
5 0
3 years ago
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