1) 3.8x + 5.2x - 6.7 = 11.3
9x = 11.3 + 6.7
9x = 18
x = 18/9
x = 2
2) 7.8y - 4.9 - 5.4y = 2.3
2.4y = 7.2
y = 7.2/2.4
y = 3
3)
![\frac{2}{3} x - 5 = 1](https://tex.z-dn.net/?f=%20%5Cfrac%7B2%7D%7B3%7D%20x%20-%205%20%3D%201)
![\frac{2}{3} x = 5 + 1](https://tex.z-dn.net/?f=%20%5Cfrac%7B2%7D%7B3%7D%20x%20%3D%205%20%2B%201)
![\frac{2}{3} x = 6](https://tex.z-dn.net/?f=%20%5Cfrac%7B2%7D%7B3%7D%20x%20%3D%206)
Multiply by 3 by both sides:
![3 \times \frac{2}{3} x = 3 \times 6](https://tex.z-dn.net/?f=3%20%5Ctimes%20%5Cfrac%7B2%7D%7B3%7D%20x%20%3D%203%20%5Ctimes%206)
Simplify:
2x = 18
x = 18/2
x = 9
4)
![\frac{7}{5} y = 3 - \frac{1}{5}](https://tex.z-dn.net/?f=%20%5Cfrac%7B7%7D%7B5%7D%20y%20%3D%203%20-%20%5Cfrac%7B1%7D%7B5%7D%20)
Do lowest common denominator:
![\frac{7}{5} y = \frac{(5 \times 3) - 1}{5}](https://tex.z-dn.net/?f=%20%5Cfrac%7B7%7D%7B5%7D%20y%20%3D%20%5Cfrac%7B%285%20%5Ctimes%203%29%20-%201%7D%7B5%7D%20)
![\frac{7}{5} y = \frac{15 - 1}{5}](https://tex.z-dn.net/?f=%20%5Cfrac%7B7%7D%7B5%7D%20y%20%3D%20%5Cfrac%7B15%20-%201%7D%7B5%7D%20)
![\frac{7}{5} y = \frac{14}{5}](https://tex.z-dn.net/?f=%20%5Cfrac%7B7%7D%7B5%7D%20y%20%3D%20%5Cfrac%7B14%7D%7B5%7D%20)
Simplify by 5 by both sides:
![7y = 14](https://tex.z-dn.net/?f=7y%20%3D%2014)
![y = \frac{14}{7}](https://tex.z-dn.net/?f=y%20%3D%20%5Cfrac%7B14%7D%7B7%7D%20)
Answer:
Step-by-step explanation:
Unless there is something special about this, the answer is 25 times the area of 1 parallogram.
Area of 1 parallelogram = Base * Height
Base = B = 5.3 cm
Height = H = 3.3 cm
Area = B*H
Area = 5.3 * 3.3
Area = 17.49
There are 25 pieces.
Total Area = 25 * 17.49
Total Area = 437.25 cm^2
Answer:
72
Step-by-step explanation:
that is a right triangle
90-18=72
Answer:
Multiplication
Step-by-step explanation:
First multiplication 5x8=40 divided by 2 = 20 add back the three so the equation is now 20+3 =<u>23 The final answer</u>
Go by the order PEMDAS
P-Peretnahesis-there is none so skip this step
E-Exponents-There is none so skip this step
M-Multiplication-and division are mixed so whichever one comes first you do and then do the multiplication and division operations in the order they go
D-Division & multiplication are mixed so whichever one comes first you do and then do the multiplication and division operations in the order they go.
A-Addition and subtraction are mixed so whichever one comes first you do and then do the multiplication and division operations in the order they go
S-Subtraction-and addition are mixed so whichever one comes first you do and then do the multiplication and division operations in the order they go
A and D
456/2=228
456/3=152
1548/2=774
1548/3=516
hope this helps!