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3 years ago

The difference of 4 times a number and 15 is -16. Find the number.

Mathematics

1 answer:

hichkok12 [17]3 years ago

5 0

Answer:

-1/4

Step-by-step explanation:

4x - 15 = -16

4x = -1

x = -1/4

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If m< xyz=68 and m Mee!

torisob [31]

Answer:

Angle ZXY = 41 degrees.

Step-by-step explanation:

If WX is parallel to ZY then angle XZY = 71 degrees.

Angle ZXY = 180 - 68 - 71 = 41 degrees.

3 0

2 years ago

Given: F(x)=x+2 and G(x)=3x+5 (F - G) (x) = ? 4 -3x-3 -3x-3

lakkis [162]

What’s the x your trying to find

4 0

3 years ago

F (x) = 3r + 6. Find the inverse of f(x).

Levart [38]

Answer:

The inverse is 1/3x -2

Step-by-step explanation:

f (x) = 3x + 6

y = 3x+6

Exchange x and y

x = 3y+6

Subtract 6 from each side

x-6 = 3y+6-6

x-6 = 3y

Divide by 3

1/3x - 6/3 = y

1/3x -2 = y

The inverse is 1/3x -2

3 0

2 years ago

This exercise uses the population growth model. The population of a certain species of fish has a relative growth rate of 1.9% p

BlackZzzverrR [31]

Answer:

n(t) = 11e^0.019t

Step-by-step explanation:

The estimated population in 2010 = 11,000,000 = initial population

The growth rate = 1.9% per year = 1.9/100 =

The exponential growth model follows the general form :

n(t) = ae^rt

a = Initial population ; r = growth rate ; t = period

Hence, we have ;

n(t) = 11e^0.019t in millions

5 0

2 years ago

Two mechanics worked on a car. The first mechanic worked for 10 hours, and the second mechanic worked for 5 hours. Together they

dimaraw [331]

The per hour rate of first mechanic is $95 and per hour rate of $75.

Step-by-step explanation:

Let,

First mechanic's rate = x

Second mechanic's rate = y

10 hours charges of first mechanic = 10x

5 hour charges of second mechanic = 5y

According to given statement;

10x+5y=1325 Eqn 1

x+y=170 Eqn 2

Multiplying Eqn 2 by 10

$10(x+y=170)\\10x+10y=1700\ \ \ Eqn\ 3$

Subtracting Eqn 2 from Eqn 3

$(10x+10y)-(10x+5y)=1700-1325\\10x+10y-10x-5y=375\\5y=375$

Dividing both sides by 5

$\frac{5y}{5}=\frac{375}{5}\\y=75$

Putting y=75 in Eqn 2

$x+75=170 \\x=170-75\\x=95$

The per hour rate of first mechanic is $95 and per hour rate of $75.

Keywords: linear equation, elimination method

Learn more about elimination method at:

#LearnwithBrainly

8 0

3 years ago