Answer:
1. Yes
2. No
3. Yes
Step-by-step explanation:
We have three equations where x is equal to -4. We are then asked if -4 are a solution to these equations.
To solve we need to substitute the x in every equation for -4. Start :
1.
3(2(-4) - 4) = -36
3(-8 - 4) = -36
-24 - 12 = -36
Therefore -4 is a solution.
2.
5(-4) - 6(-4) - (-4) = 18
-20 + 24 + 4 = 18
4 + 4 = 18
8 ≠ 18
Therefore -4 is not a solution.
3.
5 - 2(3(-4) - 1) = 31
5 - 2(-12 - 1) = 31
5 - 2(-13) = 31
5 + 26 = 31
Therefore -4 is a solution.
Answer:
Area of the plot= 24*12= 288
Area of smaller section= 20*8=160
For Brick Path= 288-160= 128
Hope it helps you.
Answer:
Multiply the first equation by 3 and multiply the second equation by -2.
This is justified by the multiplication property of equality
Step-by-step explanation:
we have
----> first equation
----> second equation
step 1
Multiple the first equation by 3 both sides
-----> by multiplication property of equality
----> new first equation
step 2
Multiple the second equation by -2 both sides
-----> by multiplication property of equality
----> new second equation
step 3
Solve the system of equations by elimination
Adds new first equation and new second equation
Find the value of x
substitute the value of y in any equation and solve for x
The solution is the point 
therefore
Multiply the first equation by 3 and multiply the second equation by -2.
This is justified by the multiplication property of equality
$540 dollars because 9times 60
Answer:
c = 5
Step-by-step explanation:
This is the classic problem that the ancients (particularly the Egyptians) used extensively. When the Nile over flowed in spring, the land had to be reclaimed and surveyed in the early summer for planting. The 3-4-5 triangle was used to determine right angles for surveying purposes.
Formula
c^2 = a^2 + b^2
Givens
a = 3
b = 4
c = ?
Solution
c^2 = 3*3 + 4*4
c^2 = 9 + 16
c^2 = 25
Take the square root of both sides
To take the square root on your calculator, find the √ on the key pad. Some calculators give it a key and some have the symbol on the body of the calculator. If has its own key do it like this.
√
25
=
The answer should come up as five. If the √ is on the body of the calculator, then
2nd F
√
25
=
The same 5 will come up.
Answer
c = 5
