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3 years ago

What is the value of the expression [5 × (3 + 6)] – 8?

Mathematics

2 answers:

Ne4ueva [31]3 years ago

7 0

Answer:

Step-by-step explanation:

PEMDAS

Order of operations tell you to do what's in the parentheses first then multiply by 5 lastly, subtract 8

Sergeeva-Olga [200]3 years ago

5 0

The answer is 37. Hope this helps!

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On April 11, 2012, two earthquakes were measured off the northwest coast of Sumatra. The first had a magnitude of 8.6. The secon

Hoochie [10]

Answer:

Option D. 2.51 is correct.

Step-by-step explanation:

Magnitude of first earthquake = 8.6

Let intensity of first earthquake be x

$Magnitude = \log(\frac{x}{S}),\text{ where S is seismographic factor}\\\\\implies 8.6=\log(\frac{x}{S}).......(1)$

Magnitude of second earthquake = 8.2

Let intensity of second earthquake be y

$Magnitude = \log(\frac{y}{S}),\text{ where S is seismographic factor}\\\\\implies 8.2=\log(\frac{y}{S}).......(2)$

Now, to find the factor by which intensity of first earthquake is greater than intensity of second : we divide equation (1) by equation (2)

$\implies\log(\frac{x}{y})=8.6 - 8.2\\\\\implies \log(\frac{x}{y})=0.4\\\\\implies\frac{x}{y}=10^{0.4}\\\\\implies\frac{x}{y}=2.51$

Hence the required factor is 2.51

Therefore, Option D. 2.51 is correct.

4 0

3 years ago

I need the answer to this ASAP

Inessa [10]

Answer:

Option B

Step-by-step explanation:

6 0

3 years ago

When I have walked 20% of the way to school, I have 1200 metres more to walk than when I have 20% of the walk remaining.

Orlov [11]

Given:

I have walked 20% of the way to school.

I have 1200 metres more to walk than when I have 20% of the walk remaining.

To find:

The distance from home to school.

Solution:

Let x be the distance from home to school.

I have already walked 20% of the way to school and i have 1200 metres more to walk than when I have 20% of the walk remaining.

It means 1200 is $100\%-20\%-20\%=60\%$ of the total distance from home to school.

$1200=\dfrac{60}{100}x$

$1200=0.6x$

$\dfrac{1200}{0.6}=x$

$2000=x$

Therefore, the distance from home to school is 2000 metres.

7 0

3 years ago

From the sun of 4+3x and 5-4x+2x2⬅subtract the sum of 3x2-5x and -x2⬅+2x+5

lozanna [386]

Hi I like numbers12344675890

6 0

3 years ago

Selena has 31 days to complete her quilt for the county fair. The blue squares in the quilt can be sewn at a rate

Setler79 [48]

Answer:

The answer is a

Step-by-step explanation:

Becuase its right

6 0

3 years ago

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