MATHEMATICS
COLLEGE

Answer: 3 letters to US = 3*0.94 = 2.82

2 local letters = 2*0.44 = 0.88

checking: 2.82+0.88 = 3.70

to get rid out of 0.04 cents you have to multiply it by 5. so total number of letters would be 5.

2 local letters = 2*0.44 = 0.88

checking: 2.82+0.88 = 3.70

to get rid out of 0.04 cents you have to multiply it by 5. so total number of letters would be 5.

MIDDLE SCHOOL

What is a solid figure without any bases and with only one curved surface

The answer is cir le or sphere

For example it would be ellipsoid or sphere

HIGH SCHOOL

Which sum or difference identity would you use to verify that cos (180° - ∅) = -cos ∅? a.

sin (α -β) = sin α cos β – cos α sin β

b.

cos (α -β) = cos α cos β – sin α sin β

c.

cos (α -β) = cos α cos β + sin α sin β

d.

sin (α + β) = sin α cos β + cos α sin β

Answer: Option C is correct

Step-by-step explanation:

We know tha tCos(A-B) = cosA cosB + sinAsinB

Plugging A = 180 and B = Ф

cos(180-Ф)= cos180cosФ+sin180sinФ

= (-1) cosФ+ (0) sinФ [ since cos180=-1 and sin180 =0]

= -cosФ + 0

= -cosФ

Therefore option C is the correct answer.

Answer:

Option (b) is correct.

b)

Step-by-step explanation:

Given

To prove the above stated formula we have to choose one of the identity from the given options .

Since right side of above formula is which is same as , we will use the identity

We know and

Substitute above, we get,

Thus, Option (b) is correct.

MIDDLE SCHOOL

There are 30 students in a class. The teacher will choose 2 students at random to represent the class at an assembly. How many groups of 2 students can be chosen? A. 870 B. 435 C. 60 D. 15

Answer:D

Step-by-step explanation:Because 30 divided by 2 equals 15

↓→→→→→→→→→↑ ↓→→→↑ ⇅- the number of students students in a group groups in all

COLLEGE

Write 7.085 × 10-14 as an ordinary number 0.000 000 000 007 085 0.000 000 000 000 708 5 0.000 000 000 000 0708 5 0.000 000 000 000 0070 85

The ordinary number for the given Scientific notation is 0.00000000000007085.

Given that, .

What is scientific notation?Scientific notation is a method for expressing a given quantity as a number having significant digits necessary for a specified degree of accuracy, multiplied by 10 to the appropriate power such as .

The given number can be written as

= 0.00000000000007085

Therefore, the ordinary number for the given Scientific notation is 0.00000000000007085.

To learn more about the Scientific notation visit:

brainly.com/question/18073768.

#SPJ5

7.085x10-14 would simplify to 70.85-14, which equals 56.85

HIGH SCHOOL

A rectangular box has a height of 10 cm. If the width is 1.5 times the height and the depth is the length of the width, what is the surface area of the rectangular box in square centimeters?

Surface area = 2 * ( height*width + height * length + width * length )

Width: 1.5×10=15

depth: width=15

height: 10

2(10×15+15×15+15×15)

=2(150+225+225)

=2(600)

=1200

depth: width=15

height: 10

2(10×15+15×15+15×15)

=2(150+225+225)

=2(600)

=1200

COLLEGE

Y=x2-10x+16 in axis of symmetry

I dont know i will tell you when i find out

MIDDLE SCHOOL

What is the area of this composite shape?

13 in.

--

Enter your answer in the box.

4 in.

in2

8 in.

Step-by-step explanation:

It's 27

Your welcome!!!!

MIDDLE SCHOOL

Write 1.50 as a mixed number

The answer is 150 over 100 hope this helps

MIDDLE SCHOOL

Simplify

5x +2 (3-x)

Answer:

3x+6

Step-by-step explanation:

1. Use the distruibutive property and multiply 2 and 3, 2 and x

2. then you will get 5x+6-2x

3. you can simplify 5x-2x becuase they are like terms

4. you will end up getting 3x+6

Answer:

3x+6

Step-by-step explanation:

Open parenthesis:

5x+6-2x

Combine like terms:

3x+6

:)