Please help me pleeeeeeeeeeease

Usando un sistema de ecuaciones vamos a ver que entran 24 libros de letras en el estante.

Vamos a usar las variables:

Por el texto, podemos saber que el peso maximo que tolera el estante esta dado por el sistema de ecuaciones.

30*x + 6*y = P

10*x + 18*y = P

Podemos igualar esas dos ecuaciones para obtener:

30x + 6y = 10x + 18y

30x - 10x = 18y - 6y

20x = 12y

x = (12/20)*y

Ahora, podemos reemplazar esto en una de las dos ecuaciones, por ejemplo la primera:

30x + 6y = P

30*(12/20)y + 6y = P

(3/2)*12*y + 6y = P

18y + 6y = P

24y = P

Así concluimos que entran 24 libros de letras en el estante.

Sí quieres aprender más sobre sistemas de ecuaciones, puedes leer:

https://brainly.com/question/20868687

Answer:

-8

Step-by-step explanation:

when there are two negetive numbers you add them not subtract

Answer:

[tex]x>5[/tex]

Step-by-step explanation:

[tex]\frac{x}{25}>5\\\\25(\frac{x}{25})>25(5)\\\\\frac{x}{1}>125\\\\x>125\\\\\underline{x>5}\Longleftarrow\:Answer[/tex]

Answer:

1 =125

2=55

3=95

...........

Answer:

2 1/2

Step-by-step explanation:

An arithmetic sequence is found when you subtract consecutive terms. The difference is always 3/8 between the terms.

Answer:

A

Step-by-step explanation:

Multiply 13.9 and 3.85

Answer:

IS A

Step-by-step explanation:

youre welcome

The quotient of two expressions is the division of the expressions

The quotient of [tex]\frac{7^{-1}}{7^{-2}}[/tex] is 7

The expression is given as:

[tex]\frac{7^{-1}}{7^{-2}}[/tex]

Rewrite the above expression by applying the law of indices

[tex]7^{-1 + 2[/tex]

Simplify the exponent

[tex]7^{1[/tex]

Evaluate the exponent 7 raise to the power of 1

7

Hence, the quotient of [tex]\frac{7^{-1}}{7^{-2}}[/tex] is 7

Read more about quotient at

https://brainly.com/question/7068223

Answer:

D.

Step-by-step explanation:

Answer:

the mean is 5

Step-by-step explanation:

Answer:

15,17,19,21,23

Step-by-step explanation:

Enjoy You All!

Answer:

4

Step-by-step explanation:

How many yards in 12 feet?

                                                                         1 yd

Multiply 12 feet by the conversion factor  ---------------   obtaining   4 yd

                                                                         3 ft

Answer:

24.5

Step-by-step explanation:

35% of 70 is  24.5

so 70 plus 24.5 = 94.5

Answer:

4x²y* (-6xy²)= -24x³y³

Answer:

344miles

Step-by-step explanation:

if 258=3/4

=1

258÷3/4=344

Answer:

344 miles

Step-by-step explanation:

258 ÷ 3/4 = 344

1) Height of local building = 10 feet

2) Intial velocity of a fireworks = 100 ft/sec

3) h(t) = -16t^2 + h  

Answer: everything looks correct from my side

Step-by-step explanation:

Answer:

help me plss huhuhu T_T wjgaiwjzsashs

Answer:

5040°

Step-by-step explanation:

assuming you mean the sum of the interior angles.

the sum of the interior angles of a polygon is

sum = 180° (n - 2) ← n is the number of sides

here n = 30 , then

sum = 180° × 28 = 5040°

Answer:

A

Step-by-step explanation:

We have the graph of the function f(x).

We want to determine which of the given is true of the graph from [tex]x=g[/tex] to [tex]x=\infty[/tex].

So, essentially, we are focusing on the last curve (see image below).

First, since the curve is above the x-axis, the curve is positive.

Second, since the curve is curving upwards, this means that it must be increasing. Another way to think about this is to think about the slope of our curve. While we can't calculate the exact slope, the average slope will be positive, so our function is increasing.

So, our answer is A.

And we're done!

Answer:

The answer is  

her score was in the top 85% of all test takers' scores.

Step-by-step explanation:

Percentile is the relative standing in a set of data from the lowest values to highest values.

If your score is in the 85th percentile, it means that 85% of the scores are below your score and 15% are above your score.

Answer:

A. Her score was better than those of 85% of all test takers.

Step-by-step explanation:

This means that 85% of the students scored lower on the test, so approximately 15% scored higher.

Answer:

13.4445 I think.

Step-by-step explanation:

Answer:

HOPE THIS HELPS

Step-by-step explanation:

You need to first plot the points on the graph.

Since, it says you need to reflect across x axis, you need same number of square units.

For example, P has the coordinates( -2,3 ). -2 lies on the x axis, so the point doesn't go neither left nor right. It is 3 squares above the x axis, so the reflected point should be 3 squares below the x axis. Likewise, you can do the other points.

Hope it helps :)

Answer:

9-2 is7

Step-by-step explanation:

Answer:

7

Step-by-step explanation:

1.) Let's substitute 4 for [tex]S[/tex].
[tex]9 - \frac{8}{S}[/tex]
[tex]= 9 - \frac{8}{4}[/tex]
[tex]= 9 - 2[/tex]
[tex]= 7[/tex]

Answer:

E

Step-by-step explanation:

"S" stands for "side" and "A" stands for "angle"

SAS = side angle side

The order is important because the angles must be between the two congruent sides.

One pair of congruent sides is AC = CE as shown by the single tickmarks.

The other pair of congruent sides is BC = CD shown by the double tickmarks

The congruent angles are the vertical angles BCA and DCE. Vertical angles are always congruent. Note how these angles are sandwiched between the tickmarked sides.

Answer:

38+37i

Step-by-step explanation:

Answer:

26 x 2

Step-by-step explanation:

40% of 130 = 52

26 x 2 = 52

Answer: 26x2

Step-by-step explanation:

[tex]______________________________________________[/tex]

What is the decimal equivalent to -3 3/12

[tex]\huge\rm{ANSWER:}[/tex]

[tex]\huge\rm{SOLUTION:}[/tex]

To begin, keep in mind that - 3 3/12 is a mixed number, also known as a mixed fraction. It has a valid fraction as well as a complete number.

The following is a list of the numbers in a mixed fraction:

[tex]\huge \rm{ - 3}[/tex] the whole number.

[tex]\huge \rm{ 3}[/tex] the numerator

[tex]\huge \rm{ 12}[/tex] the denominator

Follow these procedures to convert -3 3/12 from a mixed number to a decimal number:

Divide the denominator by the numerator to convert the correct fraction to decimal.

3 ÷ 12 = 0.25

To get the entire number of the mixed fraction, multiply it by this decimal number.

-3 + 0.25 = - 3.25

Therefore, the decimal equivalent to -3 3/12 is -3.25

[tex]______________________________________________[/tex]

===========================================================

Explanation:

Add up the numbers in the second column:

4+19+25+32 = 80

There are 80 people being surveyed in the table.

Of those 80 people surveyed, 32 of them exercised for more than 136 minutes.

The probability of selecting someone who exercised for more than 136 minutes is the fraction 32/80 = (16*2)/(16*5) = 2/5

----------

Multiply this probability with the larger sample size of 300 to get

(2/5)*300 = 0.4*300 = 120

We estimate that 120 people would exercise for more than 136 minutes.

Note that 120/300 = 2/5.

Answer:

84.2118

Step-by-step explanation:

34.982 + 45.8 + 3.4298=84.2118

Answer:

[tex]3(x - 5)[/tex]

Step-by-step explanation:

[tex]3(x - 5) =( 3)(x) + (3)( - 5) = 3x - 15 \\ \\ 3(x + 5) = (3)(x) + (3)(5) = 3x + 15 \\ \\ 3x( - 15) = (3x)( - 15) = - 45x[/tex]

Answer:

-1/4

Step-by-step explanation:

We use the formula:

[tex] \frac{y₂ -y₁}{x₂ -x₁} [/tex]

plugging in we have

[tex]\frac{ (- 1)-(1)}{(6) -( - 2)} = \frac{ - 2}{8} = - \frac{1}{4} [/tex]

Therefore our slope is -1/4