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3 years ago

Write one pair of brackets in this calculation so that the answer is correct. 5 + 2 × 7 – 4 = 11

Mathematics

1 answer:

BartSMP [9]3 years ago

5 0

Answer:

$5+2*(7-4) =11$

Step-by-step explanation:

This expression was kind of trial and error for me seeing as I'm not really good at logic, but this is pretty basic. There are three possible places the parentheses can be placed (assuming each pair holds 2 terms);

$(5+2)*7-4\\5+(2*7)-4\\5+2*(7-4)$

The answer to the first expression would be 45, which is not equal to 11.

The answer to the second expression would be 15, which is also not equal to 11.

The answer to the last expression is 11, so that is the correct answer.

Hope this helped :D

- Shay

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Answer:

circumcenter

Step-by-step explanation:

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3 years ago

Solve the equation 2x2 + 13x + 15 = 0 by factoring. Show all steps.

natita [175]

Answer:

(2x + 3)(x + 5)

Step-by-step explanation:

2x² + 3x + 15 = 0

(2x + 3)(x + 5)

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3 years ago

Since the school was opened the number of students has increased 60%. There are 240 students. Calculate the number of the studen

Alja [10]

Answer:

150 students

Step-by-step explanation:

60% = 0.6

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2 years ago

1.<br> 15% of what number is 45?

Rom4ik [11]

Answer:

15% of 300 is 45

6 0

3 years ago

Read 2 more answers

How many years will it take for the account to reach $18,600? Round your answer to the nearest hundredth

Margarita [4]

<span>it depends how the interest is calculated, but there's not much of a difference

assuming its continuously compouned, you use this formula: A(t)=Pe^(rt), where A is the final amount, P is the initial investment, r is the interest, and t is the time in years

you want to find t such that A(t)=18,600 so 18,600=1000e^(.0675t)

you need to use logarithm to figure it out, take the natural log of both sides

the following properties will come into use:

ln(a*b)=ln(a)+ln(b)
ln(a^b)=bln(a)
ln(e)=1

taking the natural log

ln(18,600)=ln(1000e^(.0675t))

ln(18,600)=ln(1000)+ln(e^.0675t)

ln(18600)=ln(1000) + .0675t

now solve for t: t= (ln(18600)-ln(1000))/.0675

t=43.31</span>

4 0

3 years ago