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kykrilka [37]
3 years ago
7

Kelly telephoned brook about a homework problem. Kelly said, “Four plus three times two is 14, isn’t it?” Brook replied, “No, it

’s 10.” Did someone make a mistake? Can you explain where these two answers came from?
Mathematics
2 answers:
Nuetrik [128]3 years ago
8 0
Kelly made a mistake by not following PEMDAS: Parentheses, Exponents, Multiplication and Division, Addition and Subtraction. She added 4 and 3 before multiplying it by two when the multiplication comes before the addition or subtraction. Brook is correct.
allochka39001 [22]3 years ago
7 0

Answer:


Step-by-step explanation:

Keely should follow the BODMAS rule

then she will get the correct answer 10


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lina2011 [118]

Answer:

<h2>f(x) = 3x + 4</h2>

Step-by-step explanation:

f(x + 1) = 3x - 7

f(x) = f(x + 1 - 1) = 3(x - 1) + 7 = 3x - 3 + 7 = 3x + 4

Check

f(x) = 3x + 4

f(x + 1) = 3(x + 1) + 4 = 3x + 3 + 4 = 3x + 7 CORRECT

8 0
3 years ago
fladli sells televisions. He earns a fixed amount for each television and an additional $ 20 if the buyer gets an extended warra
ivanzaharov [21]

Answer: $80


Step-by-step explanation:

Given: The amount earned by Fadil on selling 14 televisions= $1400

Therefore, the amount he earned on selling 1 television=\frac{1400}{14}=\$100

Since, he sold televisions with extended warranty and he earns $20 additional for it.

Then, the fixed amount Fadil earns for each​ television=\$100-\$20=\$80

Hence, Fadil earns $80 as the fixed amount for each televison.

4 0
4 years ago
The radius of a circle is (7x+3)cm. Write an expression to represent the area of the circle in simplified form
zepelin [54]

Answer:

A = π(7x + 3)² cm²

Step-by-step explanation:

A = πr² is the appropriate equation.  If r = 7x + 3 cm, then the area of this particular circle is:

A = π(7x + 3)² cm²

3 0
3 years ago
Four classmates collect data by conducting a poll. They
Stolb23 [73]
D. Aidan’s

The larger the sample size (number of people asked), the more accurate the results generally are, due to the law of large numbers.
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2 years ago
Which of the following is a solution of 4x^2=-9x-4
NeTakaya

Answer:

(-9+√17)/8

Step-by-step explanation:

its an example of quadratic

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