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3 years ago

Pls help. I am not very smart!

Mathematics

2 answers:

Yanka [14]3 years ago

8 0

Answer:

Umm I'm not entirely sure but I think its the last one

jonny [76]3 years ago

4 0

Answer:

3 1/3=−1/2x+(−3)

Step-by-step explanation:

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20 is what percent of 50?

djverab [1.8K]

We can rephrase the question as "What percent of 50 is 20?".
"What percent ..." is an unknown. We'll use the variable x to represent this unknown.

The word 'of' in mathematics can mean 'multiply'. Likewise the word 'is' can mean 'equal'.

Now we have the phrase "20 equals to x times 50".

Or in an equation: 20 = x * 50

Solve for x.

20 = x * 50
$\frac{20}{50}$ = x <-- Divide both sides by 50

Simplify the fraction.

$\frac{20}{50} = \frac{2}{5}$

Convert the fraction into a decimal.

$\frac{2}{5}$ = 0.4

Convert the decimal into a percent.

0.4 = 40%

So, 40% is the answer.

3 0

4 years ago

-9x2 + 13x – 1=0<br><br> I need 3 answers, pls help me:)

kifflom [539]

The answer to this question is x = 13/9 = 1.444

5 0

3 years ago

In the table shown, the ratio of miles biked to hours biked is constant.

lys-0071 [83]

Using proportions, it is found that the proportion $\frac{m}{7} = 11$ is used to determine the value of m.

-----------------

We look at both tables, one show the distance in miles biked and the other shows the number of hours biked.

From the tables, we can check that the relation is proportional, that is, in each hour, 11 miles are biked, as $\frac{132}{12} = \frac{44}{4} = \frac{11}{1} = 1$ .
Thus, the following proportional relationship between m and h is established:

$\frac{m}{h} = 11$

m is found when h = 7, thus, the proportion is:

$\frac{m}{7} = 11$

A similar problem is given at brainly.com/question/24342347

4 0

3 years ago

A carnival game allows the player a choice of simultaneously rolling two, four, six, eight, or ten fair dice. Each die has six f

Leviafan [203]

Answer:

Roll two dices

Step-by-step explanation:

Every dice rolled has two chances of six of winning by showing a 1 or 2, which is the same as one chance of three.

On the opposite, you have four chances of six of loosing by getting a 3,4,5 or 6, which is the same as two chances of three.

Since the chances of loosing are bigger than the ones of winning, every roll makes it more probable of getting a 3,4,5 or 6, so you need to roll as few dices as possible, in this case two is the minimum allowed.

3 0

4 years ago

Show that the points A(2,-2), B(14, 10), C(11, 13) and

Vedmedyk [2.9K]

Answer:

is not a rectangle

Step-by-step explanation:

The midpoints of the diagonals are ...

AC midpoint = ((2, -2) +(11, 13))/2 = (13/2, 11/2)

BD midpoint = ((14, 10) +(-2, 1))/2 = (6, 11/2)

The midpoints of the diagonals are different, so this is not a rectangle or any sort of parallelogram.

6 0

4 years ago