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3 years ago

PLEASE HELP I CAN'T CHOSE BETWEEN B AND D

Mathematics

2 answers:

olga nikolaevna [1]3 years ago

8 0

Answer:

Step-by-step explanation:

Take 7x as seven times Anna's age, then –6 to represent 6 years less.

cestrela7 [59]3 years ago

6 0

Answer:

as annas age =x

arbys age=y

y=7x-6

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Help please rn help

aksik [14]

Area of the large semicircle

$= \pi{r}^{2} \div 2$

$= \frac{22}{7} \times 12 {}^{2} \times \frac{1}{2}$

$= \frac{11}{7} \times12 \times 12$

$= \frac{11}{7} \times 144$

$= 226.28$

Area of the small semicircle

$= \pi {r}^{2} \div 2$

$= \frac{22}{7} \times 6 {}^{2} \times \frac{1}{2}$

$= \frac{11}{7} \times 6 \times 6$

$= \frac{11}{7} \times 36$

$= 56.57$

Area of the figure

$= 226.28 - 56.57$

$= 169.71 {cm}^{2}$

8 0

3 years ago

Which set is closed under subtraction?

Genrish500 [490]

Answer:

C. The set of rational numbers

Step-by-step explanation:

Don't listen to the other person. I trusted them and got the answer wrong. I just got the question and guessed the second time. I fortunately got the answer right. Good luck! :) <3

6 0

3 years ago

Read 2 more answers

Drag and drop each pair of triangles to indicate whether the triangles are similar or not similar.

vovikov84 [41]

Put the triangle inside of each other lining up the 90° angle corners.

6 0

3 years ago

Need help and exact locations please, very confused

nadezda [96]

Answer:

here you go ;d

Step-by-step explanation:

4 0

3 years ago

A Plane flies at x miles per hour in still air. Flying with a tailwind, it's speed is 485 miles per hour. Against the wind, it's

Deffense [45]

Answer:the speed of the wind is 20 miles per hour.

Step-by-step explanation:

A Plane flies at x miles per hour in still air. This means that the normal speed of the plane is x miles per hour.

Let y represent the speed of the wind.

Flying with a tailwind, it's speed is 485 miles per hour. This means that

the total speed of the plane would be x + y. Therefore

x + y = 485 - - - - - - - - 1

Against the wind, it's air speed is only 445 miles per hour. This means that

the total speed of the plane would be x - y. Therefore

x - y = 445 - - - - - - - - - 2

Adding equation 1 and equation 2, it becomes

2x = 930

x = 930/2 = 465

Substituting x = 465 into equation 1, it becomes

465 + y = 485

y = 485 - 465

y = 20 miles per hour

5 0

3 years ago