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NemiM [27]
3 years ago
10

Multiply the following -7x(11x +12)

Mathematics
2 answers:
Elena L [17]3 years ago
8 0

Answer: -77x^2 - 84x

Step-by-step explanation:

-7x ( 11x +12)

-77x^2 - 84x

Andrei [34K]3 years ago
6 0

Key to this problem! Distribution!

-7x(11x+12)

Imagine -7x going to both 11x and 12. Meaning it would multiply with both those numbers. If helpful, write arrows that it goes to both numbers inside the parenthesis to help you out.

-7x(11x)+12(-7x)

-7 x 11 is -77, and x times x is x^2, so the first part would equal to -77x^2

12 x -7 is -84, and add a x to get -84x.

The final answer is -77x^2-84x

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Steve's scores on 6 of his tests were 92, 78, 86, 92, 95, and 91. If he took a seventh test and raised the mean of his scores by
monitta

Answer:

96

Step-by-step explanation:

First we need to know the mean of the Steve's scores on 6 of his tests. Given the six scores as 92, 78, 86, 92, 95, and 91.

Mean = sum of the scores/Total test taken

Mean = 92+78+86+92+95+ 91/6

Mean = 534/6

Mean = 89

If he took the seventh test and the mean score is raised by 1 them the new mean will be expressed as;

New mean = 92+78+86+92+95+ 91+x/7 = 89+1

Where x is the new score. Note that of a new score is added, the total year taken will also change to 7

To get x;

92+78+86+92+95+ 91+x/7 = 89+1

92+78+86+92+95+ 91+x/7 = 90

534+x/7 = 90

Cross multiply

533+x = 90×7

533+x = 630

x = 630-534

x = 96

Hence the score of the seventh test is 96

8 0
3 years ago
The value of my hundred digit is 300, the value of my tens digit is zero. The value of my ones digit is an even number greater t
rusak2 [61]

Answer:

308 would be the number you are looking for.

Step-by-step explanation:

6 0
3 years ago
What is the answer ?
fomenos

Answer:

19/60 or .317

Step-by-step explanation:

C = 95/300

95/300 = 19/60

19/60 = .317

3 0
2 years ago
What is the surface area for this design?
Umnica [9.8K]

Answer:

Surface Area = 157 in^2

Step-by-step explanation:

Surface area is the area of each side added together.

Front = Trapezoid =  <u>b1 + b2</u> * h          <u> 5 + 9 </u>  *  5   = 27.5              

                                        2                        2                              

Back = Trapezoid =  <u>b1 + b2</u> * h           <u> 5 + 9 </u>  *  5   = 27.5               27.5

                                        2                        2                                        27.5

Right = Rectangle = l * w                      6.4 * 5 =  32                           32

Left = Rectangle = l * w                           5 * 5 =  25                           25

Bottom = Rectangle = l * w                     9 * 5 =  45                           45

Top = Rectangle = l * w                          5 * 5 =  25                          <u> 25     </u>

                                                                                                             157 in^2

8 0
3 years ago
Sandy is helping her uncle at this coffee shop. She observes that, when ordering coffee, 13 of customers select chocolate flavor
otez555 [7]
Answer: The probability that 3 or more of the next 5 customers will order chocolate is 30%.  3/10

Sandy conducted her own experiment to answer this question. She observed what groups of 5 customers ordered. In her experiment, 30% of the time at least 3 of the customers ordered chocolate.

The fraction 30% is 3/10.
7 0
3 years ago
Read 2 more answers
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