Answer:
-2
Step-by-step explanation:
5(2z + 4) = 0
Divide both sides by 5.
2z + 4 = 0
Subtract 4 from both sides.
2z = -4
Divide both sides by 2.
z = -2
Step-by-step explanation:
The first thing we have to do before we can actually do the problem is turn the words into a math equation.
If we use <em>x </em>as our "number," we see that "The sum of a number and 2" can also be written as <em>x</em>+2. The word "Is" almost always means (=), so now we have (<em>x</em>+2) = . The very last part, "6 less than twice that number," means 2<em>x - </em>6.
So, our whole equation is, (<em>x </em>+ 2) = (2<em>x </em>- 6), which simplifies to -<em>x </em>= -8, or
<em>x</em> = 8
Answer
Triangle = 60° ; Quadrilateral = 90° ; Pentagon = 108° ; Octagon = 135° ;
Decagon = 144° ; 30 -gon = 168° ; 50 -gon = 172.8° ; 100 -gon =176.4°
Step-by-step explanation:
You follow the equation (N-2)*180, then divide the answer with the the number of sides. Example for Triangle: (N-2)*180=(3-2)*180=(1)*180=180 then divide by 3 because in a triangle there are 3 sides. 180/3=60.
Answer:
272$
Step-by-step explanation:
Since it is at a sale of 20% off that means that we will have to subtract 100% from 20% which is 80%
Now to find the exact value, we will have to multiply 80%, or 0.80 with 340
0.80*340= 272$
Therefore our answer is 272$
- Hope this helped :)
-Brainliest is most appreciated :)
Answer:
sweatshirts cost $42
t-shirts cost $18
Step-by-step explanation:
9x+3y=288
x+6y=270
substitute 270-6y for x in the first problem
9(270-6y) +3y=288
2430-54y+3y=288
2430-51y=288
51y=-2142
y=42
then plug y=42 into the second equation
x+6(42)=270
x+252=270
x=18
