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3 years ago

I need help with both of these if you know any of them them helppp me pls will give 20 points

Mathematics

1 answer:

Aliun [14]3 years ago

4 0

Answer:

1) B. similar

2) D. (4, 2)

Step-by-step explanation:

When a figure is dilated, the shapes will be similar. Reflected is another transformation so that's wrong. Same size and congruent is wrong since that would have to make the dilated size equal which can't since it's contradicting.

B: (4, -2)

Reflection across the x-axis:

(x, y) → (x, -y)

(4, -2) → (x, -y)

(4, 2)

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The average (arithmetic mean) of the 43 numbers in list L is a positive number. The average of all 48 numbers in both lists L an

skelet666 [1.2K]

Answer:

$33\frac{1}{3} \%$

Step-by-step explanation:

Given:

The average (arithmetic mean) of the 43 numbers in list L is a positive number.

The average of all 48 numbers in both lists L and M is 50 percent greater than the average of the 43 numbers in list L.

Question asked:

What percent greater than the average of the numbers in list L is the average of the numbers in list M?

Solution:

As the total number of observation in both list = 48

And the number of observation in list L = 43

Then, the number of observation in list M = 48 - 43 = 5

Let the average of the 43 numbers in list L = 100

Then the average of all 48 numbers in both lists L and M = $100+ 100\times50\%$

$=100+100\times\frac{50}{100} \\= 100+\frac{5000}{100} \\= 100+50 = 150$

The average of the numbers in list M = 150 - 100 = 50

To find percent greater than the average of the numbers in list L in compare to average of the numbers in list M,

Average of the numbers in list L - average of the numbers in list M divided by the average of all 48 numbers in both lists L and M multiplied by 100

$=\frac{100-50}{150} \times100\\\ =\frac{50}{150} \times100\\=\frac{5000}{150} = 33\frac{1}{3} \%$

Thus, $33\frac{1}{3} \%$ greater than the average of the numbers in list L is the average of the numbers in list M.

6 0

3 years ago

Please help a girl out I'm so confused rn

mars1129 [50]

Answer:

200 kg

Step-by-step explanation:

since 1 lb = 0.45 kg all you do is 90 ÷ 0.45

that'll get you 200

200 kg is how much Dane Danny weighs

7 0

2 years ago

How to find 3 1/4 ÷ 5

bagirrra123 [75]

Answer:

3/20

Step-by-step explanation:

3 x 1/4 x 1/5 = 3/20

6 0

3 years ago

The soution to -2 (1-4x)=3x+8 is<br> a 6/11<br> b 2 <br> c -10/7<br> d -2

alexandr1967 [171]

2

Mark brainliest please

Hope this helps

6 0

3 years ago

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A farmer has 1,800 feet of fencing and wants to fence off a rectangular field that borders a straight river. he needs no fence a

astra-53 [7]

There are 2 short sides x and 1 long side y.

x+x+y=1,800
2x+y=1,800
y=1,800-2x

The area of the rectangle is A=x(1,800-x).

A is a function with variable x. Moreover it is a quadratic (second degree) function.

The graph of the function is a parabola which opens downwards, because the signs of the leading coefficients of the factors, multiply to minus:

(x)(-x)=-x^2.

This means that the highest point of the parabola, is its vertex V(h,k), so the function takes its largest value for x=h.

The roots of A=x(1,800-x) are x=0 and x=1,800, thus the x coordinate of the vertex, must be the midpoint of 0 and 1,800, that is 900.

Answer:

A=x(1,800-x)

largest area is when x=900

4 0

3 years ago

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