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3 years ago

Find the sum of (x² + 6x – 5) + (2x2 + 15).

Mathematics

1 answer:

erma4kov [3.2K]3 years ago

6 0

<h3><u>Answer</u> :</h3>

★ (x² + 6x - 5) + (2x² + 15)

➠ x² + 6x - 5 + 2x² + 15

By combining similar terms, we ge $t$

➠<u> x² + 2x²</u> + 6x - <u>5 + 15</u>

➠ 3x² + 6x - 10

By taking 3x common, we get

➠ 3x(x + 2) - 10

<h3>Hope It Helps!</h3>

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2 Points

Jobisdone [24]

The answer is a. $11 bc you divide the amount made by the hours worked

3 0

3 years ago

The radius r(t)r(t)r, (, t, )of the base of a cylinder is increasing at a rate of 111 meter per hour and the height h(t)h(t)h, (

sp2606 [1]

Answer:

The volume is decreasing at a rate 20π cubic meter per hour.

Step-by-step explanation:

We are given the following in the question:

The radius is increasing at a rate 1 meter per hour.

$\dfrac{dr}{dt} = 1\text{ meter per hour}$

The height is decreasing at a rate 4 meter per hour

$\dfrac{dh}{dt} = -4\text{ meter per hour}$

At an instant time t,

r = 5 meter

h = 8 meters

Volume of cylinder =

$\pi r^2 h$

where r is the radius and h is the height of the cylinder.

Rate of change of volume is given by:

$\dfrac{dV}{dt} = \dfrac{d(\pi r^2 h)}{dt}\\\\\dfrac{dV}{dt} = 2\pi rh\dfrac{dr}{dt} + \pi r^2\dfrac{dh}{dt}$

Putting all the values we get,

$\dfrac{dV}{dt} = 2\pi (5)(8)(1) + \pi (5)^2(-4)\\\\\dfrac{dV}{dt} = 80\pi - 100\pi = -20\pi \approx -62.8$

Thus, the volume is decreasing at a rate 20π cubic meter per hour or 62.8 cubic meter per hour.

3 0

3 years ago

What is y=7/3x+5?<br> x=-3

andrew11 [14]

Hello!

Ok so we have y= 7/3x + 5 and initial condition of x=-3 so we just plug -3 in for x and chug along at this point! :)

y=(7/3)*(-3/1)+5= -7+5 = -2

Hope this helps! Any questions please just ask! Thank you!!

7 0

3 years ago

Please show picture 6×(3+2) divided by 10 ??? Please show picture

Mumz [18]

:) There's no picture but I can solve this for you :)

Do PEMDAS

Parentheses
Equations
Multiplication
Division
Addition
Subtraction

$\frac{6(3+2)}{10} \\ \\ 3 + 2 =5,right? \\ \\ \frac{6(5)}{10} \\ \\ 6(5)= 30,right ? \\ \\ \frac{30}{10} = 3,right \\ \\ \\ \\ Answer: 3$

Good luck on your assignment and enjoy your day!

~ $MeIsKaitlyn:)$

5 0

3 years ago

Charlotte is visiting Brazil and is looking at souvenirs to purchase. She finds a jersey that costs 137 Brazilian real. If the c

aleksandrvk [35]

The cost of the jersey with a price of 89 Brazilian real in U.S. dollars is $25.230.

<h3>What is an equation?</h3>

An equation is an expression that shows the relationship between two or more numbers and variables.

Independent variables represent function inputs that do not depend on other values, while dependent variables represent function outputs that depends on other values.

1 dollar = 5.43 Brazilians real

137 Brazilian real = 137/5.43

= $25.230

Hence, The cost of the jersey is $25.230

Learn more about equation here:

brainly.com/question/2972832

#SPJ2

5 0

1 year ago

Read 2 more answers