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3 years ago

I need to know what the answer is plz help

Mathematics

2 answers:

balu736 [363]3 years ago

3 0

What’s the question ?

kykrilka [37]3 years ago

3 0

Could you say the question i cant answer it?

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A=b=c then find the value of (a+b+c) ^2/a^2+b^2+c^2

bagirrra123 [75]

The Answer Is 3a^2 3b^2 3c^2

Since all the variables equal each other, you may pick one variable to copy in the equation.

${a}^{2} + a^{2} + {a}^{2} = 3 {a}^{2}$

And since they're the same numbers, squaring a will have no effect in the equation.

8 0

3 years ago

Read 2 more answers

Given a mean of 80 and a standard deviation of 3, label the normal curve below.

Sav [38]

Answer:

The points from the left;

71, 74 , 77, 80, 83, 86 , 89

Step-by-step explanation:

Here, we want to label the normal curve given the mean and the standard deviation

From what we have, the central part is the mean while the other parts are deviations from the mean

We will label the graph starting from the left to the right

1 is 3 SD from the mean (negatively)

That will be 80-3(3) = 80-9 = 71

2 is 2 SD away

That will be;

80 -2(3) = 80-6 = 74

The 3rd part is 1 SD away

That will be 80-3 = 77

The midpoint is for the mean which is 80

The point after this will be;

80 + 3 = 83

The point after this will be;

83 + 3 = 86

Next is

86 + 3 = 89

5 0

3 years ago

What's the square root of 5

dusya [7]

Answer:

2.236

Step-by-step explanation:

5 0

4 years ago

Read 2 more answers

Is this right and I need help getting the decimal estimate

e-lub [12.9K]

The estimation is -12.25 and it is not right it should be -12&-13

7 0

3 years ago

Kayla wants to find the width, AB, of a river. She walks along the edge of the river 65 ft and marks point C. Then she walks 25

AlladinOne [14]

Answer:

Part A) The triangles ABC and EDC are similar by AAA, because the three internal angles are equal in both triangles

Part B) The width of the river is about $39\ ft$

Step-by-step explanation:

we know that

If two triangles are similar, then the ratio of its corresponding sides is equal and its corresponding angles are congruent

Part A) we know that

In this problem , triangles ABC and CDE are similar by AAA, because its corresponding angles are congruent

m<DCE=m<ACB -----> by vertical angles

m<EDC=m<ABC -----> is a right angle

m<DEC=m<CAB -----> the sum of the internal angles must be equal to 180 degrees

Part B) we know that

The triangles ABC and EDC are similar -------> see Part A

therefore

$\frac{BC}{DC}=\frac{AB}{DE}$

substitute the values and solve for AB

$\frac{65}{25}=\frac{AB}{15}$

$AB=15*(\frac{65}{25})=39\ ft$

8 0

3 years ago