MATHEMATICS MIDDLE SCHOOL

List the first 5 multiples.

4:
7:
9:
12:

Answers

Answer 1
Answer: 4: 4, 8, 12, 16, 20
7: 7, 14, 21, 28, 35
9: 9, 18, 27, 36, 45
12: 12, 24, 36, 48, 60

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Answers

3 is the correct answer 5-2=3
The correct answer is 5.

What is the surface area of the rectangular pyramid below?(Image)

A. 386.9 ft2
B. 593.8 ft2
C. 639.4 ft2
D. 1,053.2 ft2

Answers

Answer:

The correct option is B.

Step-by-step explanation:

The area of pyramid is the sum of area of rectangular base and 4 triangular sides. Two triangle have base 18 ft and height 14.1 ft. Other two have base 10 ft and height 16 ft.

The area of rectangle is

A=length* width

Length of the base is 18ft and width is 10ft.

A_1=18* 10=180

The area of a triangle is

A=(1)/(2)* base * height

The area of triangle with base 18 ft and height 14.1 ft is

A_2=(1)/(2)* 18 * 14.1=126.9

The area of triangle with base 10 ft and height 16 ft is

A_3=(1)/(2)* 10 * 16=80

The total surface area of the rectangular pyramid is

A=A_1+2* A_2+2* A_3

A=180+2* (126.9)+2* (80)

A=593.8

The surface area of the rectangular pyramid is 593.8 ft². Therefore the correct option is B.

Answer:

it is B

Step-by-step explanation:

T to the power of 2 equals 25

Answers

5 to the power of 2 is 25

To solve this, you would multiple 5*5 and you will get 25

If the 9th term of an A.P is 0, prove that its 29th term is twice its 19th term

Answers

Let the first term, common difference and number of terms of an AP are a, d and n respectively.

Given that, 9th term of an AP, T9 = 0 [∵ nth term of an AP, Tn = a + (n-1)d]

⇒ a + (9-1)d = 0

⇒ a + 8d = 0 ⇒ a = -8d ...(i)

Now, its 19th term , T19 = a + (19-1)d

= - 8d + 18d [from Eq.(i)]

= 10d ...(ii)

and its 29th term, T29 = a+(29-1)d

= -8d + 28d [from Eq.(i)]

= 20d = 2 × T19

Hence, its 29th term is twice its 19th term

Answer:

Proved below.

Step-by-step explanation:

a9 = a1 + 8d = 0          where a1 = first term and d = common difference.

we need to prove that

a1 + 28d = 2(a1 + 18d

simplifying:-

a1  + 36d - 28d = 0

a1 + 8d = 0 which is what we are given.

Therefore  the proposition is true.

Write three examples of decimals that have a 4 in the tenths place

Answers

==> 0.45
==> 0.46
==> 0.47
They all are decimals having four in tenths place.
Tenth place is the place just after the decimal point.
.4, .44, .444
the first number right after the decimal is the tenths place

Which symbol gives you more information about two numerical expressions

Answers

you use parenthesis to tell the difference between to groups of numbers
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