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3 years ago

Evaluate 4x-(y + 2) + 6 when x=2 and y=3

Mathematics

1 answer:

eduard3 years ago

3 0

Step-by-step explanation:

4(2)-(3+2)+6, where x=2 and y=3

8-(5)+6

8-5+6

3+6

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Solve for z z−4/9−1/3=5/9

Svetach [21]

4/3 because (check the picture)

3 0

3 years ago

fomenos

Answer:

Two figures are similar if the figures have the same shape but different sizes.

Then if we have two figures X and X'

Such that one dimension of X is D, the correspondent dimension on X' will be:

D' = k*D

Such that k is the scale factor that relates the figures.

1:k

Because all the dimensions will be rescaled by the same scale factor k, we can conclude that any surface on X will be related to the same surface in X' by:

S' = k^2*S

then the ratio of the surfaces is:

1:k^2

While the relation between the volumes will be:

V' = k^3*V

Here the ratio is:

1:k^3

Ok, in this case we have two cylinders

We know that the ratio between the base area ( a surface) is:

9:25

a) We want to find the ratio: curved surface area of A : curved surface area of B

Because again we have a surface area, the ratio should be exactly the same as before, 9:25

b) height of A : height of B

In this case, we have a single dimension.

Because in the rescaling of a surface we need to use k^2, then we can conclude that the ratios:

9:25

is related to k^2

Then the ratio, in this case, is given by applying the square root to both sides of the previous ratio, so we get:

√9:√25

3:5

This is the ratio of the heights.

Also from this we could get the value of k, that is the right value when we leave the left value equal to 1, we can get that if we divide both sides by 3.

(3/3):(5/3)

1:(5/3)

Then:

k = 5/3

7 0

3 years ago

there are 10 students in a class 7 boys and 3 girls , what is the probability that everyone in the group is a boy

jeka94

The probability is 7/10 because there are only 7 boys or it could be 70%

3 0

3 years ago

Read 2 more answers

David goes into a candy store with $5.00.

maksim [4K]

He can buy 14 lemon heads

4 0

3 years ago

In a homicide case 33 different witnesses picked the same man from a line up. the line up contained 5 men. if the identification

polet [3.4K]

the correct question in the attached figure

we know that

the probability
that a witness picks a particular person by chance-----> P=1/5

the probability
that all 7 witnesses would pick the same person-----> P=1/5^7=0.0000128

the answer is the option B 0.0000128

There are a variety of problems in which the number of witnesses change, for example
....find the probability that all 9 witnesses would pick the same person

in this case, the probability would be-------> P=1/5^9=0.000000512

6 0

4 years ago