Answer:
step 3: he should have divided both sides by -7
Answer:
The perimeter is 
cm.
Step-by-step explanation:
Perimeter is found by adding all sides of the triangle together. So, this is what we need to find: 
- Only <u>like radicals</u> can be added or subtracted from one another. They'll have the same root number (which seems to be true for this question) as well as the radicand, which is the number/expression under the radical.
Look at the number under the radical: 7, 63, and 28. These numbers all share a factor of 7: 7/7 = 1, 63/7 = 9, 28/7 = 4.
Notice how 9 and 4 are perfect squares, so we can simplify the radicals using this common factor of 7.
remains the same; 
; and
. Now they are like radicals and can be added!
Answer: The sum of two Irrational numbers will be irrational
Step-by-step explanation: Because they are irrational so its result will also be irrational
Answer: a.) 40320
b.) 336
Step-by-step explanation:
since we have 8 possible positions, with 8 different candidates, then there are 8 possible ways of arranging the first position, 7 possible ways of arranging the Second position, 6 ways of arranging the 3rd position, 5 possible ways od arranging the 4th position, 4 possible ways of arranging the 5th position, 3 possible ways of arranging the 6th position, 2 possible ways of arranging the 7th position and just one way of arranging the 8th position since we have only one person left.
Hence, the Number of possible sample space for different 8 positions is by multiplying all the number of ways we have in our sample space which becomes:
8*7*6*5*4*3*2*1 = 40320.
b.) By the sample space we have, since we've been asked ti arrange for only the firat 3 positions, then we multiply just for the first 3ways of choosing the positions, this becomes:
8*7*6 = 336
Answer:
Step-by-step explanation:
we have
Solve for x
Applying difference of squares in the denominator of the second term in the left side
Multiply both sides by (x+3)(x-3)
Apply the distributive property in the left side
Combine like terms left side
Group terms
Divide by 3 both sides
