Answer:
He must score an 86 or more on his third test.
Step-by-step explanation:
An average is calculated by the sum of the numbers divided by the total number (#) of numbers (if that makes sense). Knowing this, we can write an algebraic equation in order to find the answer. Let x equal the unknown number.
John's previous test scores and this test score now must be at least an average of 90 or more. Therefore, the equation would be 
. Isolate x to find the answer:
Therefore, he needs to get at least a 86 or higher.
Answer: <u>X=-3</u>
Step 1) Rearrange the equation by subtracting what is to the right of the equal sign from both sides of the equation :
5*(x-4)+3*x-9*x-(6-(2*x+5)+8*x)=0
Step 2) ((5 • (x - 4) + 3x) - 9x) - (6x + 1) = 0
Step 3) Pull out like factors : -7x - 21 = -7 • (x + 3)
Step 4) -7 • (x + 3) = 0
Step 5) Solve : -7 = 0 This equation has no solution.
A a non-zero constant never equals zero.
Step 6) Solve : x+3 = 0
Subtract 3 from both sides of the equation :
x = -3
Step-by-step explanation:
Answer:
-53/12
Step-by-step explanation:
Answer:
5
Step-by-step explanation:
Edge i think dont quote me on this plz
Hey there!
First of all, let's find the area of the pool.
15(30)=450 feet squared.
Now, let's find the area of the triangle.
4(3)=12/2=6 feet squared
Assuming that you can land anywhere in the pool, including the diving board (as we didn't get any measurements for it so that we can eliminate it)
This gives us 6/450, which simplifies to 1/75.
Therefore, you have 1/75 or 1.3% chance of landing on the raft.
I hope this helps!
