Answer:
x= -2
Step-by-step explanation:
9(x-1)=7x-13 1) do distributive property
9x-9=7x-13 2) add nine to both sides which means you would take out the 9 since -9 and 9 cancel out each other and add 9 to -13
9x=7x-4 3) subtract 7x from both sides which means you would remove the 7x since -7x and 7x cancel out each other and subtract 7x from 9x
2x=-4 4) divide both sides by 2
x= -2
Sorry if this was confusing
Answer:
cos (a+b)= cos a cos b - sin a sin b
Step-by-step explanation:
I had to answer this question too, but I don't know the explanation. I just saw it in this Khan Academy video. https://www.khanacademy.org/math/precalculus/x9e81a4f98389efdf:trig/x9e81a4f98389efdf:angle-addition/v/cosine-addition-identity-example
Answer:
Mean:36
Median:27
Mode:27
Range:50
Step-by-step explanation:
Mean: 19+26+27+27+30+53+69/7=36
Median: The middle number in the sequence when arranged in ascending order which is 27
Mode: The number that appeared more than others which is 27
Range: This is the difference between the largest number and the lowest number in the sequence which is 50.
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Answer:
A
Step-by-step explanation:
A cannot be split in half evenly :)
Answer:
29 girls 16 boys
Step-by-step explanation:
65% of 45 is 29.25
35% of 45 is 15.75(closer to 16)
29+16=45