Answer:
Step-by-step explanation:
plug y into the first equation:
8x+5y=24
8x+5(-4x)=24
8x-20x=24
-12x=24
x=-24/12
x=-2
then plug x to the second equation
y=-4
y=-4(-2)
y=8
x=-2
y=8
Answer:
(C)85.56 cm², 12.4 cm
Step-by-step explanation:
The Area of the screen of the new phone is :
19.68cm² + Area of the current phone screen size
The current phone screen size has dimensions: 6.1 cm and 10.8 cm,
Area of the current phone screen size = 6.1 cm × 10.8cm
Area of the current phone screen size = 65.88 cm²
Hence, The Area of the screen of the new phone is :
19.68cm² + Area of the current phone screen size
= 19.68cm² + 65.88cm²
= 85.56 cm²
The new phone screen must have an area of 85.56cm², which is the product of 6.9 cm and ___
The is calculated as:
85.56cm²/6.9cm
= 12.4cm
Therefore, the new phone screen must have an area of 85.56cm², which is the product of 6.9 cm and 12.4cm
Option C is correct
Answer:
The answer is 3418.1 ft rounded to the nearest tenth.
Step-by-step explanation:
The total volume of the cylinder can be defined by the Area of circular base * Perpendicular height.
The area of the circular base can be calculated as
![\pi \times {r}^{2}](https://tex.z-dn.net/?f=%5Cpi%20%5Ctimes%20%20%7Br%7D%5E%7B2%7D%20)
where r is the radius of the circular base, which is 8 ft.
The area of the circular base is
![\pi \times {8}^{2} = 64\pi](https://tex.z-dn.net/?f=%5Cpi%20%5Ctimes%20%20%7B8%7D%5E%7B2%7D%20%20%3D%2064%5Cpi)
We also know the height of the cylinder is 17 ft.
Hence, the volume of the cylinder is
![64\pi \times 17 = 1088\pi = 3418.0528...](https://tex.z-dn.net/?f=64%5Cpi%20%5Ctimes%2017%20%3D%201088%5Cpi%20%3D%203418.0528...)
This will be rounded up to 3418.1 with the nearest tenth
Answer:
175≥ 15x+65
Step-by-step explanation:
Kevin needs to have greater than or equal to 175 for his bike so you would start like this 175≥ then because he can mow lawns for money and each lawn is 15 you would arrange the inequality like this 175≥ 15x next you just add the 65 because its the amount of money he already has to mke 175≥ 15x+65.
Answer:
explaination
Step-by-step explanation:
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