What is the solution for 5x+7y--6 and x+8y=12?
2 answers:
5x+7y=6 and x+8y=12 multiply the 5 coefficient by opposite of x value so. -5(x+8y)=-5×12. Simplify to get -5x-40y=-60. Now add the two equations to eliminate x. 5x+7y=6 + -5x-40y=-60. Equals -33y=-66 Now solve for y by dividing -33 on both sides . Y= 2. Now substitute your answer for y into one of the origibal equations to find x . X+8(2)=12 Now solve x+16=12 Now move 16 to right side .x= -16+12 . Solve to get x= -4. So now you have your answer for x and y (-4,2) .
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Answer:
The radius is 5 cm
Step-by-step explanation:
The formula for the area of a circle is :
To work out the length of the radius you would first need to divide the area of 78.5 cm by pi (pi=3.14), this gives you . This is because by dividing the area by pi we are isolating the value of the radius squared.
The final step is to work out the radius. You can do this by finding the square root of the radius squared which is 25, this gives you 5 cm. This means that the radius is 5 cm. This is because the square root is a number that when squared equals that number.
1) Divide 78.5 by pi.
2) Find the square root of 25 cm squared.
In this question pi is 3.14
Given:
The inequality is:
To find:
The values that make the given inequality true.
Solution:
We have,
It means the value of h must be less than or equal to 2.
In the given options, the list of numbers which are less than or equal to 2 is
-6, -3, -1, 1, 1.9, 1.99, 1.999, 2
The list of numbers which are greater than 2 is
2.001, 2.01, 2.1, 3, 5, 7, 10
Therefore, the first 8 options are correct and the required values are -6, -3, -1, 1, 1.9, 1.99, 1.999, 2.