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baherus [9]
4 years ago
15

Will odd numbers when added always make even numbers

Mathematics
1 answer:
Fittoniya [83]4 years ago
8 0
Always. consider 2x which is always even (divisible by 2)

then 2x+1 is the form of all odd numbers.

add 2 of the odd numbers together to get (2x+1)(2y+1) = (4y² +2x +2y) + 1

the part in parentheses is always even can you see why? then adding one again always gives us an odd number.
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David took his family out for dinner. He planned to leave a 20% gratuity on the bill. What is the total cost if the bill was $12
denis23 [38]
Let’s find 1% of 125 first.
125 x 0.01 = $1.25
1.25 x 20 = $25 gratuity.

Bill + gratuity = Total
$125 + $20 = $145

$145 is the answer.

Hope that helped! :)
4 0
3 years ago
Read 2 more answers
Simplify (5 1/3) exponential 3
jeyben [28]
Answer:

125 /3



hope this helps have a great day

mark brainliest:)
6 0
3 years ago
If sin x=2/9,x, in quadrant i, then find(without findingx): sin(2x), cos(2x), tan(2x)
Sergio039 [100]
We have that
<span>sin x=2/9

we know that
sin</span>² x+cos² x=1---------> cos² x=1-sin² x-----> cos² x=1-(2/9)²
cos² x=1-(4/81)------> (81-4)/81-----> 77/81
cos x=√(77/81)

Sin 2x = 2 sin x cos x-------> 2*(2/9)*(√(77/81))----> (4/81)*√77---> 0.43

Sin 2x=0.43
so
cos² 2x=1-sin² 2x---------> 1-[0.43]²-----> 1-[0.1878]----> 0.81
cos² 2x=0.81-----------> cos 2x=0.9

tan 2x=sin 2x/cos 2x--------> tan 2x=0.43/0.9---------> tan 2x=0.48

the answers are
sin 2x=0.43
cos 2x=0.9
tan 2x=0.48


8 0
4 years ago
Find the surface area of the figure
saveliy_v [14]

Answer:

36 in over 2

Step-by-step explanation:

4 0
2 years ago
Fifteen hours is what part of the day. Write the answer as a fraction in simpliest form​
galben [10]

Answer:

\frac{5}{8}

Step-by-step explanation:

There are 24 hours in 1 day, thus 15 hours is

\frac{15}{24} = \frac{5}{8} of a day in simplest form

8 0
4 years ago
Read 2 more answers
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