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olga_2 [115]
3 years ago
10

Which of the following shapes is a prism? Select All that apply.

Mathematics
1 answer:
kakasveta [241]3 years ago
4 0

Answer:

C D

Step-by-step explanation:

You might be interested in
3. In the figure below, E is on AD and C is on BD. The dimensions given are in meters. What is the length, in meters, of CD?
damaskus [11]

Answer:

C. 3,960

Step-by-step explanation:

∆ADB ~ ∆EDC. Therefore,

\frac{AB}{EC} = \frac{DB}{DC}

\frac{2,000}{1,200} = \frac{2,640 + x}{x} (substitution)

Solve for x

\frac{5}{3} = \frac{2,640 + x}{x}

Cross multiply

5*x = 3(2,640 + x)

5x = 7,920 + 3x

5x - 3x = 7,920

2x = 7,920

x = 7,920/2

x = 3,960 meters

7 0
2 years ago
A country's population in 1994 was 184 million. in 1997 it was a 190 million. estimate the population in 2015 using the exponent
cestrela7 [59]

Answer:

107.82

Step-by-step explanation:

5 0
3 years ago
Find the sum of the sequence. 45+46+47+48+...+108
Anna11 [10]
We know, S = n/2 [ a + l ]
Here, a = 45
l = 108

Calculation of n:
a(n) = a + (n - 1)d
108 = 45 + (n - 1)1
108 - 45 = n - 1
63 + 1 = n
n = 64

Now, substitute in the expression:
S = 64/2 [ 45 + 108 ]
S = 32 [ 153 ]
S = 4896

In short, Your Answer would be 4896

Hope this helps!
7 0
3 years ago
Read 2 more answers
#6 math help fun please?
julsineya [31]

Answer:

mean: 27.6

median: 32

mode: 35

range: 35

Step-by-step explanation:

Definitions:

mean: average

median: middle

mode: the number that comes up the most

range: the difference between the highest and lowest values/numbers

What to do:

mean: you add up all the numbers and then you divide that sum by the amount of numbers there are (I'm not going to do the work because that's a lot of numbers to type out, but you can check your work with my answer).

~answer is 27.6

median: middle number --> 32

mode: the number that comes up the most --> 35

range: 40-5 = 35

4 0
4 years ago
Nine more than seven times a number, n, gives the same value as one more than the square of the number. Write an equation and so
Maru [420]

Answer:

7n + 9 = n² + 1

n = -1, 8

General Formulas and Concepts:

<u>Pre-Algebra</u>

Order of Operations: BPEMDAS

  1. Brackets
  2. Parenthesis
  3. Exponents
  4. Multiplication
  5. Division
  6. Addition
  7. Subtraction
  • Left to Right

Equality Properties

<u>Algebra I</u>

  • Factoring
  • Solving quadratics

Step-by-step explanation:

<u>Step 1: Set up Equation</u>

"Nine more" is + 9

"Seven times a number" is 7n

"One more" is + 1

"Square of the [same] number" is n²

7n + 9 = n² + 1

<u>Step 2: Solve for </u><em><u>n</u></em>

  1. Subtract 7n on both sides:                    9 = n² - 7n + 1
  2. Subtract 9 on both sides:                      0 = n² - 7n - 8
  3. Factor quadratic:                                    0 = (n - 8)(n + 1)
  4. Solve roots:                                            n = -1, 8
4 0
3 years ago
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