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2 years ago

11. Describe and correct the error in evaluating the expression. –21-7)= -14

Mathematics

1 answer:

likoan [24]2 years ago

8 0

Answer: -28

Step-by-step explanation:

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Find the mean of the set<br><br> 17.2 18.3 14.9 16.8 15.3

Elena-2011 [213]

To find the mean is to find the average, which means add all the data values together and divide by the number of data values. In this case, we add those values together and divide by 6, which equals 82.5/6= 13.75

6 0

3 years ago

Factories the following question

Ber [7]

Answer:

$k(3a-2b)$

Step-by-step explanation:

In the equation $3ak-2bk$ , 'k' is the only common term.

Factor out 'k':

$3ak-2bk\\\\\boxed{k(3a-2b)}$

Hope this helps.

3 0

2 years ago

Find the product of the binomials.<br> (x - 2) (3x + 1) (4x – 3)=

Papessa [141]

Answer:

Step-by-step explanation:

(x - 2) (3x + 1) (4x – 3)=

12x^3-29x^2+7x+6

Foil the binomials.

x*3x x*4x etc

8 0

2 years ago

88 feet/second = 60 miles/hour. How many feet per second is 1 mile? (Hint: divide both side of the equation by the same amount.)

zalisa [80]

Answer:

1 mile/hour is equivalent to 1.47 feet/seconds

Step-by-step explanation:

Given

$88 ft/s= 60 miles/hr$

Required

Determine the equivalent of 1 mile/hour

$88\ ft/s= 60\ miles/hr$

Express 60 as 60 * 1

$88\ ft/s= 60 * 1\ mile/hr$

Divide both sides by 60

$\frac{88\ ft/s}{60}= \frac{60 * 1\ mile/hr}{60}$

$\frac{88\ ft/s}{60}= 1\ mile/hr$

Reorder

$1\ mile/hr = \frac{88\ ft/s}{60}$

Divide 88 by 60

$1\ mile/hr = 1.46666666667\ ft/s$

Approximate to 3 significant figures

$1\ mile/hr = 1.47\ ft/s$

Hence;

1 mile/hour is equivalent to 1.47 feet/seconds

8 0

2 years ago

Find the area of the circle. Round your answer to the nearest hundredth.

OlgaM077 [116]

Answer:

4.71 ft^2

Step-by-step explanation:

to calculate area its pie * diameter with the diameter in this question being 1.5 and when it says to the nearest hundredth it means to the second away from the point

5 0

2 years ago