Answer:
368.72 ft^2
Step-by-step explanation:
25x15-2π
=375-2π
~368.72
Answer:
70
Step-by-step explanation:
8 choose 4
= (8!)/(4!*4!)
=(8*7*6*5)/(4*3*2*1)
=1680/24
=70
Answer:
False
Step-by-step explanation:because 2:2 dont line up.
The general linear equation is in the form of y=mx+c where m is the slope or gradient... if m is negative, the rate of change is negative and if m is positive the rate of change is positive.
So firstly you need to rearrange the equations to get them in this form.
7x-y=9
7x=y+9
y=7x-9
Therefore this has a positive rate of change of 7
13x+y=2
y=-13x+2
Therefore this has a negative rate of change of -13
The last one is a little more difficult... we can get the gradient using two of these coordinates and using the formula of:
m=(y2-y1)/(x2-x1), where y2 is the y-coordinate of the second point, y1 is the y-coordinate of the first point, etc...
I'll use the points, (5, 1) and (8,3)
Therefore,
m=(3-1)/(8-5)
m=2/3
Therefore this has a positive gradient of 2/3
Hope all that helps :)
Answer:
x=12
Step-by-step explanation:
(9^5)(9^7)=9^x
282429536481=9^x
<em>Step 1: Flip the equation.</em>
9^x=282429536481
<em>Step 2: Solve Exponent.</em>
9^x=282429536481
log(9^x)=log(282429536481)(Take log of both sides)
x*(log(9))=log(282429536481)
x=log(282429536481)/log(9)
x=12