PERE

Mathematics

1 answer:

Verdich [7]3 years ago

5 0

Answers:

A) Definition of right angles
B) Substitution
C) Definition of congruence

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Explanation:

A) The term "right angle" is another way of saying "90 degree angle". This is a definition. Think of a definition in a dictionary.
B) The substitution property allows us to replace one thing for another, as long as the two things are equal. The transitive property works as a similar idea.
C) If two angles have the same measure, then they are congruent. This is the definition of congruence (or one form of it).

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Please answer quickly will give brainliest to correct answer

Mkey [24]

Answer:

a. π(9^2)(9) - (1/3)(9^2)(9)

step-by-step explanation:

we assume that container a is the whole cylinder, and that container b is the cylinder with the cone carved out.

the formula for the volume of a cylinder is

vcyl = πr²h

the formula for the volume of a cone is

vcon = (1/3)πr²h

here, we have r=h=9 in both cases, and we want to find the difference of volumes. filling in the numbers gives

vcyl - vcon = π(9²)(9) - (1/3)(9²)(9) . . . matches choice a

comment on notation

exponents rarely get copied properly from other applications to brainly, so some editing may be required. if you don't use the equation editor or special mathematical symbols, the plain-text form for an exponent is

(base)^(exponent) . . . the exponent is signified by a caret (^)

note that grouping symbols may be required. if the exponent has an arithmetic operation in it, then it needs parentheses:

√(x) = x^(1/2)

(x^a)(x^b) = x^(a+b)

the use of the word "over" to signify a fraction is unnecessary and ambiguous. the forward slash (/) is usually used for that purpose. as with the caret, any numerator or denominator consisting of more than a single number or letter needs parentheses: (1/a) + (1/b) = (a+b)/(ab). even if you know that the denominator is a single number, as in 1/3, it understanding to put the fraction in parentheses so the appropriate interpretation is clear. (see above for examples. many people write 1/x+1 when they mean 1/(x+1), so if you mean (1/x)+1, it is to write it that way--even though that is how it should be interpreted.)

6 0

3 years ago

What coordinate expression represents the coordinates of any point after dilation by a scale factor of 2

neonofarm [45]

Answer: (x,y) → (2x,2y) .

Step-by-step explanation:

A dilation is a transformation that changes the size of the image. It either shrink or enlarge a shape by using a scale factor about a center of dilation.

If we transform point (x,y) by using dilation with scale factor k (assume center of dilation at (0,0) then the coordinate of the image will be (kx,ky).

So, the coordinate expression represents the coordinates of any point after dilation by a scale factor of 2:

(x,y) → (2x,2y) .

5 0

3 years ago

Read 2 more answers

What is the answer to -5(-3w-8)=21 for w

Sauron [17]

Answer:

w = -1.266

Step-by-step explanation:

distribute the 5 by everything in the parenthesis and then bring everyhting down then you should have a regular equation to work w

8 0