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jok3333 [9.3K]
3 years ago
10

The number of emails a friend receive each day during last 20 days is shown below. what number of days she receive 19 or fewer e

-mails in a day?
a.7

b. 11

c. 12


d. 15
Mathematics
1 answer:
Arlecino [84]3 years ago
5 0

To answer the problem just add the frequencies that correspond to email counts that are 19 or fewer. So you're adding the counts that correspond to 0-9 and 10-19. So the frequency of 0-9 is 4 and the frequency of 10 -19 is 7. So 4 + 7 = 11

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Evaluate y = 2x + 1 when x = 1
Solnce55 [7]

Answer:

y = 3

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

Step-by-step explanation:

<u>Step 1: Define</u>

y = 2x + 1

x = 1

<u>Step 2: Evaluate</u>

  1. Substitute in <em>x</em>:                    y = 2(1) + 1
  2. Multiply:                               y = 2 + 1
  3. Add:                                     y = 3
5 0
3 years ago
4x²-y²=171 and 2x-y=9, value of 2x+y
11111nata11111 [884]
So you will need to solve for x and y before evaluating 2x+y....

2x-y=9, y=2x-9  now this will make 4x^2-y^2=171 become:

4x^2-(2x-9)^2=171

4x^2-(4x^2-36x+81)=171

36x-81=171

36x=252

x=7, now we can use 2x-y=9 to solve for y...

2(7)-y=9

14-y=9

-y=-5

y=5

now we know that x=7 and y=5, 2x+y becomes:

2(7)+5

14+5

19
8 0
3 years ago
The circumference of a circle can be found using the
Ivahew [28]
Answer - to solve for the equivalent equation of r you would need to use the formula r=c/pi2.
5 0
3 years ago
Help with this please!
slega [8]

Hello,

No, this is NOT a proportional relationship.

Have a great day/night and stay safe! :)

8 0
3 years ago
Read 2 more answers
Please choose the answer that describes the scientific notation for 3,134,000,000
topjm [15]

Answer:

= 3.134 × 10^9

(scientific notation)

= 3.134e9

(scientific e notation)

= 3.134 × 10^9

(engineering notation)

(billion; prefix giga- (G))

= 3134000000

(real number)

Step-by-step explanation:


6 0
3 years ago
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