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3 years ago

I really need help with this geometry on number 7 like help please!!

Mathematics

1 answer:

vredina [299]3 years ago

3 0

Solution: 137 / 2 = 68.5

LMP is 11 degress more so 68.5 + 11 = 79.5

NMP is 11 degrees less so 68.5 - 11 = 57.5

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Edith’s age is 1/4 of Ronald’s age. In how many years will Edith’s age be 1/3 of Ronald’s age if Edith is 20 years old?

ruslelena [56]

Answer:

Step-by-step explanation:

x = Edith's age = 20 years

y = Ronald's age

x = 20 = y/4

y = 20×4 = 80 years

in z years we have

(x + z) = (y + z)/3

(20 + z) = (80 + z)/3

3(20 + z) = 80 + z

60 + 3z = 80 + z

60 + 2z = 80

2z = 20

z = 10

in 10 years Edith's age will be 1/3 of Ronald's age.

then Edith will be 30, and Ronald will be 90.

30 = 90/3

correct.

7 0

1 year ago

If m∠RQS=22x-11 and m∠RQT=12x-8, find m∠TQS

Arada [10]

Answer:

∡TQS = 10x -3

Step-by-step explanation:

∡TQS = ∡RQS - ∡RQT

= 22x - 11 - (12x - 8)

= 10x -3

3 0

2 years ago

A right cylinder has a radius of 6 m and a surface area of 84 m². Find the surface area of a similar cylinder with a radius of 2

dlinn [17]

Answer:

The surface area of the second cylinder is equal to $9.33\ m^{2}$

Step-by-step explanation:

we know that

If two figures are similar then

the ratio of their surfaces areas is equal to the scale factor squared

Let

z-------> the scale factor

x------> the surface area of the smaller cylinder (second cylinder)

y-------> the surface area of the original cylinder (first cylinder)

$z^{2}=\frac{x}{y}$

Step 1

Find the scale factor

$z=\frac{2}{6}=\frac{1}{3}$

Step 2

Find the surface area of the second cylinder

we have

$z=\frac{1}{3}$

$y=84\ m^{2}$

substitute and solve for x

$(\frac{1}{3})^{2}=\frac{x}{84}$

$x=\frac{1}{9}*84=9.33\ m^{2}$

5 0

2 years ago

PLS HELP and explain how pls

ioda

Answer:

31 r 3

i know

7 0

2 years ago

Read 2 more answers

Which recursive sequence would produce the sequence 2, -11, 54, ...

Paraphin [41]

Answer:

$n_{i+1} = -5n_i - 1$

Step-by-step explanation:

-5*2 - 1 = -11

-5*-11 - 1 = 54

4 0

5 months ago