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weqwewe [10]
3 years ago
12

In a group of kangaroos, the two lightest kangaroos weigh 25% of the total weight of the group. The three heaviest kangaroos wei

gh 60% of the total weight. How many kangaroos are in the group?
Mathematics
1 answer:
Maru [420]3 years ago
4 0

Answer:

6 kangaroos

Step-by-step explanation:

25% + 60% = 85%

15% can be only one because the two lightest are 25% of the total.

2+1+3 = 6

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Which additional facts prove that RST and<br> WXY are congruent? (Geometry)
alexandr402 [8]

Answer:

Option C

Step-by-step explanation:

In the given triangles ΔRSW and ΔWXY,

m(∠S) = m(∠X) = 60° [Given]

Properties of congruence of two triangles applicable in this question,

SAS or ASA

For the congruence of two triangles by the property SAS,

"Two corresponding sides and the included angle should be congruent"

RS ≅ WX, ST ≅ XY and ∠S ≅ ∠X

Which is not given in any option.

For the congruence of two triangles by the property ASA,

"Two consecutive angles and the side having these angles should be congruent"

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Option C will be the correct option.

6 0
3 years ago
Which is greater least or equal to
katen-ka-za [31]

Answer:

< (less than)

Step-by-step explanation:

One ninth would be less than one seventh because you would have to cut let's say a circle into more pieces, making each piece smaller.

(first image is 1/9, second image is 1/7)

7 0
3 years ago
A statistics teacher started class one day by drawing the names of 10 students out of a hat and asked them to do as many pushups
HACTEHA [7]

Answer:  b. 8.56 to 21.44

Step-by-step explanation:

Let  \mu be the  mean number of pushups that can be done.

As per given , we have

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Sample mean : \overline{x}=15

Sample standard deviation : s=9

Significance level : α=1-0.95=0.05

From t- distribution table ,

Critical two -tailed t-value for α=0.05 and df = 9 is

t_{\alpha/2, 9}=t_{0.025,9}=2.2622

Confidence interval for \mu is given by :-

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=15\pm (2.2622)\dfrac{9}{\sqrt{10}}\\\\\approx 15\pm 6.44=(15-6.44,\ 15+6.44)\\\\=(8.56,\ 21.44)

Hence, the  95% confidence interval for the true mean number of pushups that can be done is 8.56 to 21.44.

5 0
3 years ago
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Semmy [17]

Answer:

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Step-by-step explanation:

-2/3 is greater because it is closer to 0/positive than -2.

5 0
2 years ago
Evaluate 16^1/2 x 2^-3<br> Give your answer as a fraction in its simplest form.
kati45 [8]
Your answer would be 1/2
6 0
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