In the diagram below, angleAXB and angleCXB form a linear pair. Which statement must be true about the angles?

A farmer had 200 rows oh his field, He plowed 1/4 of them. How many rows did he plow? (Write the explanation and answer)

hjlf

Answer:

He plowed 50 rows.

Step-by-step explanation:

Use proportions

1/4 = x/200

then cross multiply to find x.

4x=200

Divide both sides by 4

x= 50

He plowed 50 rows.

3 0

3 years ago

Read 2 more answers

Please Solve:

Ludmilka [50]

16 as 1-4 =4secs so 1-16=16

7 0

3 years ago

Basketball shoes are on sale for 22%off. what is the reagular price if the sale price is $42?

Brrunno [24]

Answer:

The regular price was $53.85

Step-by-step explanation:

78% = $42

42 ÷ 78 x 100 = 100% = $53.85 (when rounded to 2 d.p)

4 0

4 years ago

Please I really need help! Can you answer A and B and I will mark you as brainliest!

Georgia [21]

a) The average arithmetic mean is calculated by adding all of the values and then dividing the sum by the total number of values.

$\frac{198+199(3)+200(2)+201(5)+202(2)}{13} =200.3$

Which is 200.3.

b) Assume that the new average mean is 201, then

$201 = \frac{198 + 199(3) + 200(2) + 201(5) + 202(2)+x}{14}$

Solve for x.

$2814= 2604x$

Divide by 2604 to solve for x.

$\frac{2814}{1604} = x = 1.75$

So the height of the new player is 175 cm.

3 0

4 years ago

I don’t understand this.. <br> will someone please help? Will mark Brainliest along with 20 points.

inn [45]

To say two quantities $a$ and $b$ "vary directly" with one another means that a change in one of the quantities results in a proportional change in the other quantity. For example, if $a=2b$ , then $b$ is proportional to $a$ by a factor of 2, or $a$ is proportional to $b$ by a factor of 1/2. In other words, if you change $b$ by some fixed amount, then $a$ changes by double that amount.

Mathematically this means there is some constant scaling factor $k$ such that $a=kb$ . In question 4, we're told $f(x)$ varies directly with $x^2$ , which means there's some $k$ such that

$f(x)=kx^2$

We're given that $f(x)=40$ when $x=2$ , so

$40=k\cdot2^2\implies40=4k\implies k=10$

Then when $x=5$ , we get

$f(5)=10\cdot5^2=10\cdot25=250$

- - -

For $a,b$ to "vary inversely" with one another means that a change in one quantity results in an "opposite" change in the other. In other words, if $a$ increases, then $b$ decreases, and vice versa.

Mathematically, this is the same as saying there is some fixed number $k$ such that $ab=k$ .

For example, if $k=1$ and we start with $a=1$ , then $b=1$ also. If we change to $a=2$ , then $b=\dfrac12$ ; if $a=10$ , then $b=\dfrac1{10}$ , and so on.