The average height of three students is 68 inches. If two of the students have heights of 70 inches and 72 inches respectively, then what is the height (in inches) of the third student?

Answers

Answer 1

Answer: It's 62 inches

70+72+62= 204/3= 68

Answer 2

Answer: Write the following equation:

$(70+72+x)/(3)=68\n \n 142+x=3*68\n \n 142+x=204\n \n x=204-142\n \n x=62 \ in$

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If sally had 2 apples and gave away 1 , how many does she have left ?

Answers

one apple because 2-1=1

Answer:

Step-by-step explanation:

2 - 1 = 1

What mutiplication equals to 1400

Answers

140 x 10 equals 1400 and 70 x 20 equals 1400

The answer is 200 and 700 either of them would be the right answer.

For Example 2x7=14 but when you multiply 700x2=1400 or 200x7=1400.

If you don't understand ty dividing 1400 to 2 it will equal 700.

Thank you for asking have a great day.

Factor 7x^3+28x^2+21x

Answers

The factor of the polynomial 7x³+28x²+21x are 7x, (x + 1), and (x + 3) after factorization.

What is polynomial?

Polynomial is the combination of variables and constants systematically with "n" number of power in ascending or descending order.

$\rm a_1x+a_2x^2+a_3x^3+a_4x^4..........a_nx^n$

We have a polynomial:

= 7x³+28x²+21x

$\rm =7x\left(x^2+4x+3\right)$

= 7x(x + 1)(x + 3)

Thus, the factor of the polynomial 7x³+28x²+21x are 7x, (x + 1), and (x + 3) after factorization.

Learn more about Polynomial here:

brainly.com/question/17822016

#SPJ2

Answer:

7x (x + 1 ) ( x + 3 )

Step-by-step explanation:

7x³ +28x² +21x

7x ( x² + 4x + 3 )

7x [ x² + 1x + 3x + 3 ]

7x [ x ( x + 1 ) + 3 ( x + 1 ) ]

7x (x + 1 ) ( x + 3 )

The students in Ms. Lorenzo’s class collected the following numbers of bottle caps:10, 20, 40, 50, 30, 10, 60, 10, 2040, 30, 30, 50, 70, 50, 70, 60, 30

a. Make a dot plot for the data.
b. What is the median?
c. What is the mean?

Answers

I am not sure how to show you how to do a dot plot on this website, but to see how to do a dot plot

b) Put everything in order and find the middle
10, 10, 10, 20, 30, 30, 30, 30, 40, 50, 50, 50, 60, 60, 70, 70, 2040
^^
So 40 is in the middle, making it the median

c) Add all of the values together and divide by the total number of values.
10 + 10 + 10 + 20 + 30 + 30 + 30 + 30 + 40 + 50 + 50 + 50 + 60 + 60 + 70 + 70 + 2040 = 2660
2660 / 17 = 156.5

Jacob is showing his steps to solve the expression −27.8 ÷ 1 over 7.In which step did Jacob make an error?

Step 1: −27.8 ÷ 1 over 7
Step 2: −27.8 ⋅ 7

Step 3: −194.6

Step 1

Step 2

Step 3

There is no error.

Answers

Answer:

D.There is no error.

Step-by-step explanation:

We are given that Jacob is showing his steps to solve the expression

$-27.8/(1)/(7)$

We have to find the error in Jacob steps in which he makes error

Jacob writes his first step

Step:1 $-27.8/ (1)/(7)$

Jacob's first step is true.

We know that if we changes divide sign of term into multiply then the the term which is write on right side of divide sign reciprocal. Therefore,

Step:2 $-27.8*7=-27.8\cdot 7$

Hence, Jacob's second step is right.

Now , we multiply -27.8 with 7 then we get

Step:3 $-27.8\cdot7=-194.6$

Hence, Jacob's third step is also right.

Therefore, Jacob makes no error in his steps.

Hence, Option D is true.

There is no error, Jacob did everything right :)

What is equivalent to 15/60

Answers

1/4 is equivalent to 15/60

equivalent fractions of 15/60 would be 1/4, 2/8, 3/12, 4/16, 5/20, 6/24, 7/28, 8/32, 9/36, 10/40, 11/44, 12/48, 13/52, 14/56, 15/60, 16/64, 17/68, 18/72, 19/76, 20/80

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