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3 years ago

The function f is defined by f(x)=7x - 5. Use this formula to find the following

Mathematics

2 answers:

Semenov [28]3 years ago

7 0

-103 is the answer to the question

Illusion [34]3 years ago

6 0

F(x)=7x-5
x=-14
7(-14)-5
-98-5
final answer is -103

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6. The perimeter of a parallelogram is 100 meters. The width of the parallelogram is 4 meters less than its length. Find the len

Ierofanga [76]

Answer:

x = 23, and y = 27.

Step-by-step explanation:

Lets say,

x = width

y = length

this means,

x(2) + y(2) = 100

It also says that the width is 4 meters less than the length.

if we put that into equation form it would look like this,

y - 4 = x

using these 2 equations, we can use the subustusion method to find the x.

x(2) + y(2) = 100

turns in to this :

step 1. (y - 4) (2) + y(2) = 100 - given

step 2. 2y -8 + 2y = 100 - distribute

step 3. 4y -8 = 100 - Combine like terms

step 4. 4y = 108 - Get rid of the 8

step 5 4y/4 = 108 /4 - divide

step 6 . y = 27

So if y is 27, then

x(2) + 27(2) = 100

x(2) + 54 = 100

100 - 54 = 46, so x(2) is 46, but to get x, we need to divide 46 by 2, since x multiplied by 2 equals 46.

46 / 2 = 23 = x

so x = 23, and y = 27.

and the rule that y - 4 = x still applies, since 27 - 4 = 23.

I hope this wasn't confusing! It did take a long time tho.

5 0

3 years ago

I REALLY NEED HELP PLEASE 30 POINTS AND BRIANLIEST

Mademuasel [1]

Answer:

C is the closest one but it should be -472 instead -475

Step-by-step explanation:

just insert X in the formulas and compare to P

7 0

3 years ago

Cycle City charges an initial price of $15 plus $0.75 per hour for bike rentals, which is

Novosadov [1.4K]

Answer:

See Explanation

Step-by-step explanation:

Given

$Rentals = 15 + 0.75h$

Solving (a): What does h represents

From the instruction in the question, we understand Cycle city charges an additional 0.75 per hour.

This implies that h represents the additional hour of rentals

Solving (b): What does 15 represents

From the instruction in the question, we understand Cycle city charges an a base charge of $15

This implies that 15 represents the base charge

Solving (c): 0.75h

Referring back to (a) where h represents the additional hour of rentals

0.75h represents the total charges for the additional hour

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3 years ago

Suppose we want to add some punch to a partially filled drink dispenser of punch. We know that a 65 ounce bottle of punch will i

Mkey [24]

Answer:

dh = 3 *dV / 130

Step-by-step explanation:

Given:

- volume of punch in bottle = 65 ounce

- volume of punch = v

- increase in height of punch level on dispenser = 1.5 in

Find:

- The change in height of punch in the dispenser in inches, Δh, in terms of the change in the volume of punch in the dispenser in ounces, Δv.

Solution:

We will assume a linear relationship between the increase in punch level dispenser and the increase in volume of dispenser.

h(v) = m*v + h

Where, m is change of height with respect to volume. Hence,

m = dh / dV = 1.5 / 65 = 3 / 130 in / ounce

Hence,

dh = 3 *dV / 130

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3 years ago

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