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GalinKa [24]
3 years ago
6

Help me and explain please

Mathematics
2 answers:
Jet001 [13]3 years ago
3 0

Answer: 9.87


Step-by-step explanation:

You must divided by 100.

The easiest approach is to divide a number in decimal format by 100.

987 ÷ 100 = 9.87

Crazy boy [7]3 years ago
3 0
Move the decimal point 2 to the left I think
So answer letter C.
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Last year, Liz gave 90 piano performances. This year, she gave 126 piano performances. What is the percent of increase in the an
Rashid [163]

Answer:

40%

Step by step explanation is given above

6 0
3 years ago
Please help quick!!!!!!!!
Semmy [17]

Answer:

a. V = 10*8*x

b. V= 10*8*22.5

Step-by-step explanation:

b. V= 1800

3 0
2 years ago
Find sin(a+b) if tan(a)=7/24 where a is in the third quadrant
ludmilkaskok [199]
The complete question in the attached figure

we have that
tan a=7/24    a----> III quadrant
cos b=-12/13   b----> II quadrant
sin (a+b)=?

we know that
sin(a + b) = sin(a)cos(b) + cos(a)sin(b<span>)
</span>
step 1
find sin b
sin²b+cos²b=1------> sin²b=1-cos²b----> 1-(144/169)---> 25/169
sin b=5/13------> is positive because b belong to the II quadrant

step 2
Find sin a and cos a
tan a=7/24
tan a=sin a /cos a-------> sin a=tan a*cos a-----> sin a=(7/24)*cos a
sin a=(7/24)*cos a------> sin²a=(49/576)*cos²a-----> equation 1
sin²a=1-cos²a------> equation 2
equals 1 and 2
(49/576)*cos²a=1-cos²a---> cos²a*[1+(49/576)]=1----> cos²a*[625/576]=1
cos²a=576/625------> cos a=-24/25----> is negative because a belong to III quadrant
cos a=-24/25
sin²a=1-cos²a-----> 1-(576/625)----> sin²a=49/625
sin a=-7/25-----> is negative because a belong to III quadrant

step 3
find sin (a+b)
sin(a + b) = sin(a)cos(b) + cos(a)sin(b)
sin a=-7/25
cos a=-24/25
sin b=5/13
cos b=-12/13
so
sin (a+b)=[-7/25]*[-12/13]+[-24/25]*[5/13]----> [84/325]+[-120/325]
sin (a+b)=-36/325

the answer is
sin (a+b)=-36/325

8 0
3 years ago
Round the number 2,181,465 to the ten thousands place
Shkiper50 [21]
The answer to that is 2,180,000
4 0
3 years ago
Read 2 more answers
Which of the following
Archy [21]

The answer you are looking for is 36.

If you line up the numbers numerically (4, 8, 16, 32, 36, 64), you'll see that there's a pattern. Each number, multiplied by 2, gets the next number in the sequence. 4 * 2 = 8, 8 * 2 = 16, 16 * 2 = 32, and 32 * 2 = 64.

Thus meaning 36 is the odd number out. I hope this helps!

6 0
3 years ago
Read 2 more answers
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