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3 years ago

Dear Reader,

Mathematics

1 answer:

MAXImum [283]3 years ago

5 0

If its the capital letters:
TEIEDIII
i dont really think thats right tho :/

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Is this right pls tell me FOR BRAINLIES RATE AND FOLLOW

Elenna [48]

Yes this is correct great job!

8 0

3 years ago

~~~30 POINTS~~~ Please answer this math question!

Nina [5.8K]

With a dilation, each dimension increases by the factor. Thus, if we let the dimensions be x and y, the new dimensions are 2x and 2y.

(a): The original perimeter is 2(x+y), but the new one is 2(2x+2y). This is twice the original perimeter, so it is 18*2=36.

(b): The original area is xy, and the new one is (2x)(2y), or 4xy. This is four times the original area, or 20*4=80.

(c): As it's given that the side lengths are integers, the intended solution is most likely to divide by 2 in the perimeter to see that the sum of the side-lengths is 9 and their product is 20. Guessing/checking values for each side, we see that 4 and 5 work for the smaller rectangle. Multiplying by two, the larger one has lengths 8 and 10.

Alternatively, we set them to x and y and use the equations:
x+y=9
xy=20

Dividing by y, we see that x=20/y. Substituting, we have that y+20/y=9. Subtracting 9 and multiplying by y, we have:

y^2-9y=20

Factoring, we have (y-5)(y-4)=0. The solutions to this equation are 4 and 5, which result in x=5, y=4 or x=4, y=5 respectively. Thus, we see that 4 and 5 are the side-lengths. Note that this solution did not require the assumption that the side-lengths are integers!

7 0

4 years ago

26. Matthew factored a 5th-order polynomial. Four of the factors are: (x-2), (x+2i), (x-4), and (x+4) .

Keith_Richards [23]

Short Answer C
Remark
You may think there is no way to resolve this. Either of the first two look like they might work and you cannot be sure what you will get with the last two unless you know.

The answer is one of the last two. The equation cannot have just one or even a large number of complex numbers. When you are factoring a polynomial, the number of complex numbers must be even.

The complex root you have is x + 2i. Its partner is x - 2i
The complete equation would be
y = (x - 2i)(x + 2i) (x - 2)(x + 4)(x - 4)
I'll edit to add the graph.

4 0

4 years ago

1. Many Alpine ski centers base their calculations of revenues and profits on the belief that the average skier ski’s four times

pshichka [43]

Answer:

We cannot infer at the 10% significance level that the assumption of ski centers is wrong

Step-by-step explanation:

The null hypothesis for this question can be stated as

Null hypothesis H0: =4

Alternate hypothesis Ha:

The test is two tailed

Standard Deviation –

= 2

z=(4.84-4)/(2/sqrt(63))

=3.33

Z(0.1/2)=1.645 is less than Z =3.334

Hence, we will reject H0

Hence, the average growth skier ski’s four times a year is not true

6 0

3 years ago

Someone please tell formula

ivolga24 [154]

Answer:

(i) Total cost of the flat is Rs. 540000.

(ii) Expenditure incurred on labour is Rs. 150000

Step-by-step explanation:

According to the question, cement cost is Rs. 112500, which represents 75° in the pie chart.

(i) The total cost of the flat is represented by the total 360° in the pie chart.

∴ Using unitary method

75° represents Rs. 112500

⇒ 360° represents = $\frac{112500}{75}$ × 360

= Rs. 540000

∴ Total cost of flat = Rs. 540000

(ii) Similarly, to calculate the cost of labour, represented by 100° in the pie chart, we can use the unitary method:

75° represents Rs. 112500

⇒ 100° represents = $\frac{112500}{75}$ × 100

= Rs. 150000

∴ Cost of labour = Rs. 150000

5 0

2 years ago