All categories

2 years ago

Select the correct answer.

Mathematics

1 answer:

Serhud [2]2 years ago

8 0

Answer:b

Step-by-step explanation:

You might be interested in

Ellie earns $11.35 per hour. Below you can see how many hours she worked last week. How much did Ellie earn last week? Round you

natita [175]

Answer:

Ellie earned $297.94

Step-by-step explanation:

7 0

2 years ago

Read 2 more answers

What are the real or imaginary solutions of each polynomial equation?

Semmy [17]

1) a
2) c

#1 explanation:

x^4-20x^2=-64
x^4-20x^2+64=0
(find a number that multiplies to the last number aka 64 and adds up to b aka 20)
((x-4)(x-16))^2
x= -2,2,-4,4

same for #2 w different variable and numbers

6 0

3 years ago

How many times does 8 go into 60??? i cant remember even if it does

Anit [1.1K]

It goes in it 7.5 times

4 0

3 years ago

Read 2 more answers

Find dy/dx by implicit differentiation. y cos x = 5x2 + 3y2

lbvjy [14]

Step 1:
Start by putting $\frac{d}{dx}$ in front of each term

$\frac{d}{dx}[y cos x]= \frac{d}{dx}[5x^2]+ \frac{d}{dx}[ 3y^2]$
-----------------------------------------------------------------------------------------------------------------
Step 2:

Deal with the terms in 'x' and the constant terms
$\frac{d}{dx}[ycosx]= 10x+ \frac{d}{dx} [3y^2]$
----------------------------------------------------------------------------------------------------------------
Step 3:

Use the chain rule for the terms in 'y'
$\frac{d}{dx}[ycosx]=10x+6y \frac{dy}{dx}$
--------------------------------------------------------------------------------------------------------------
Step 4:

Use the product rule on the term in 'x' and 'y'
$(y) \frac{d}{dx} cos x+(cos x) \frac{d}{dx}y =10x+6y \frac{dy}{dx}
$
$y(-siny)+(cosx) \frac{dy}{dx} =10x+6y \frac{dy}{dx}$
--------------------------------------------------------------------------------------------------------------

Step 5:

Rearrange to make $\frac{dy}{dx}$ the subject
$-y sin(y)+cos(x) \frac{dy}{dx} =10x+6y \frac{dy}{dx}$
$cos(x) \frac{dy}{dx}-6y \frac{dy}{dx}=10x+y sin(y)$
$[cos(x) - 6y] \frac{dy}{dx}=10x + y sin(y)$
$\frac{dy}{dx}= \frac{10x+ysin(y)}{cos(x)-6y}$ ⇒ Final Answer

5 0

3 years ago

Solve for x: (3x−2)(2x+3)=0

Zanzabum

(3x−2)(2x+3)=0
(3x−2)=0; x = 2/3
(2x+3)=0; x = -3/2

answer
x = -3/2 and x = 2/3

3 0

2 years ago

Read 2 more answers