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3 years ago

Please help!! I'll give 30 points and brainliest.

Mathematics

1 answer:

Valentin [98]3 years ago

8 0

Step-by-step explanation:

$3 + \frac{9}{4} = \frac{9}{x+4} \\ \\ \therefore \: \frac{3 \times 4 + 9}{4} = \frac{9}{x+4} \\ \\ \therefore \: \frac{12 + 9}{4} = \frac{9}{x+4} \\ \\ \therefore \: \frac{21}{4} = \frac{9}{x+4} \\ \\ \therefore \:21(x + 4) = 36 \\ \\ \therefore \:21x + 84 = 36\\ \\ \therefore \:21x = 36 - 84\\ \\ \therefore \:21x = - 48\\ \\ \therefore \:x = \frac{-48}{21} \\ \\ \therefore \:x = \frac{-16}{7} \\ \\ \huge \red{ \boxed{ \therefore \:x = - 2 \frac{2}{7} }}\\ \\$

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A study was done on girls' participation in informal science, technology, engineering, and mathematics (STEM) programs. The

Anastasy [175]

Answer:

Urban area = 58.27%

Suburban area = 34.83%

Rural area = 6.9%

Step-by-step explanation:

According to the scenario, computation of the given data are as follows,

Total number of women = 290

Number of women in urban area = 169

Suburban area women = 101

Rural are women = 20

So, we can calculate the percentage of number of women from each area by using following formula,

Percentage = Women in specific area ÷ total women

So, percentage of Urban area = 169 ÷ 290 = 0.5827 or 58.27%

percentage of suburban area = 101 ÷ 290 = 0.3483 or 34.83%

percentage of rural area = 20 ÷ 290 = 0.0690 or 6.9%

Pie chart for the given information is attached below.

5 0

2 years ago

Solve for the missing angle. Round to the nearest hundredth. 18 ? 13 ? = degrees

skad [1K]

Answer:

$\theta \:=43.76^{\circ \:\:}$

Step-by-step explanation:

The right triangle has the hypotenuse = 18

Let 'Ф' be the missing angle

we know that

cos Ф = adjacent/hypotenuse

Here,

The adjacent to Ф = 13

The hypotenuse = 18

cos Ф = adjacent/hypotenuse

$cos\:\theta \:=\frac{13}{18}$

$\theta \:=\cos ^{-1}\left(\frac{13}{18}\right)$

$=43.76^{\circ \:}$

Therefore, the missing angle is:

$\theta \:=43.76^{\circ \:\:}$

8 0

2 years ago

the length of a rectangle is twice its width. if the perimeter of the rectangle is 54m find its area

mixer [17]

Answer:

You can denote the width of the rectangle as x,

than the length of the rectangle will be 2x

and the perimeter of the rectangle will be two length plus two width and it should be equal to 54 in

and the equation will look 2(2x)+2x=54

solving the equation 6x=54, x=9in

So the width of the rectangle is 9in and the length is 9*2=18in

and the area of the rectangle is 9*18=162 sq in.

7 0

3 years ago

PLS HELP THIS IS A TIMED TEST, THANK YOU

laiz [17]

6 weeks.

The equation for each is:

68 + 5x

25 + 12x

To show work I reccomend making a table:).

I also reccomend usijg a graphic calculator if it is available.

If not then plug in numbers into the variables by using estimates.

4 0

2 years ago

What is the additive inverse of -9x? 1. -1/9x 2. 9x 3. -1x 4. 1x

Nat2105 [25]

Answer:9x

Step-by-step explanation: -9x + 9x = 0

If they add together to give zero then that is the additive inverse. So just change the sign

6 0

2 years ago