volume = 7*7*2 = 49*2=98
she needs to get 98 cubic feet of sand
Answer:
The net change is -.30
Step-by-step explanation:
increase means add
decrease means subtract
+3.50
-3.70
+3.30
-3.40
-------------
-.30
The net change is -.30
Answer:
There is a decrease of 0.75 sales per day
Step-by-step explanation:
Given:-
- The price of item = p
- The number of sales = x
- The relationship between "p" and "x" is given below:
4p+4x+2px=56
Find the rate at which x is changing when x=2, p=6, and dp/dt=1.5 The rate at which x is changing is [ ] sales per day
Take the time derivative (d/dt) of the entire given expression and apply chain rule on d/dt ( 2px ). Since both "p" and "x" are only functions of time "t":
d/dt
4p+4x+2px=56
4*dp/dt + 4*dx/dt + 2*(x*dp/dt + p*dx/dt)=0
Use the given values x=2, p=6, and dp/dt=1.5 to determine dx/dt
4*1.5 + 4*dx/dt + 2*(2*1.5+6*dx/dt)=0
6+4dx/dt + 2*(3+6dx/dt)=0
6+4dx/dt + 6+12dx/dt=0
12+16dx/dt=0
12=-16dx/dt
dx/dt= 12/-16
= -0.75
Choice D is correct.
I need brainliest!!!
Let's solve for x.<span>y=<span><span><span><span>−5</span>2</span>x</span>−5</span></span>Step 1: Flip the equation.<span><span><span><span><span>−5</span>2</span>x</span>−5</span>=y</span>Step 2: Add 5 to both sides.<span><span><span><span><span><span>−5</span>2</span>x</span>−5</span>+5</span>=<span>y+5</span></span><span><span><span><span>−5</span>2</span>x</span>=<span>y+5</span></span>Step 3: Divide both sides by (-5)/2.<span><span><span><span><span>−5</span>2</span>x</span><span><span>−5</span>2</span></span>=<span><span>y+5</span><span><span>−5</span>2</span></span></span><span>x=<span><span><span>−<span>2y</span></span>−10</span>5</span></span>Answer:<span>x=<span><span><span>−<span>2y</span></span>−10</span><span>5</span></span></span>
