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3 years ago

Help a girl outttt Pleaseeee

Mathematics

1 answer:

Tomtit [17]3 years ago

5 0

$⟹3x+5 = -x-7$

$⟹3x+x=-7-5$

$⟹4x=-12$

$⟹3-5x=-9+x$

$⟹3+9=x+5x$

$⟹12=6x$

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Find the area of a regular pentagon with radius 9mm

Andreas93 [3]

The area is calculated by using the formula A=(r^2)*n*sin(360/n)/2 where n is the number of sides which is 5 for pentagon and r is the radius which is 9 mm. So, using the formula, the answer is 51.4 mm^2.

6 0

3 years ago

What is the value for x in the equation 3/4x-1/2(2-1/2x)=1/3

IgorLugansk [536]

- - We are finding the value of "X"

"x" Is representing an unknown number, one that we must solve to find.

• The first step is going to be distributing our equation.

$\frac{3}{4} x + \frac{1}{4} x + - 1 = \frac{1}{3}$
↓ ↓ ↓ ↓ ↓
$( \frac{3}{4} x + \frac{1}{4} x )+ (- 1) = \frac{1}{3}
$

• Now we are going to do like terms by combining them.

$x + -1 = \frac{1}{3} 
$
$x - 1 = \frac{1}{3}$

• Now need to add "1" to both sides of our equation to get our final answer.

$x-1+1= \frac{1}{3} -1$

- - Final answer; x = $\frac{4}{3}$

3 0

3 years ago

a machine made 2 2/6 pencils in 3 3/4 minutes. how many pencils would the machine have made after/minute

erma4kov [3.2K]

<em><u>Question:</u></em>

A machine made 2 2/6 pencils in 3 3/4 minutes. How many pencils would the machine have made after 9 minutes?

<em><u>Answer:</u></em>

$\frac{504}{90}\ or\ 5.6$ pencils is made after 9 minutes

<em><u>Solution:</u></em>

Given that,

A machine made 2 2/6 pencils in 3 3/4 minutes

Which means,

$2\frac{2}{6} = \frac{14}{6}$

$3\frac{3}{4} = \frac{15}{4}$

Let "x" be the number of pencils made in 9 minutes

Therefore,

$\frac{14}{6}\ pencils = \frac{15}{4}\ minutes\\\\x\ pencil = 9\ minutes$

This forms a proportion and we can solve by cross multiplying

$\frac{14}{6} \times 9 = \frac{15}{4} \times x\\\\x = \frac{14}{6} \times 9 \times \frac{4}{15}\\\\x = \frac{504}{90}\\\\x = 5.6$

Thus, $\frac{504}{90}\ or\ 5.6$ pencils is made after 9 minutes

7 0

3 years ago

Latonya swims 50 meters in 1/2 minute, what is the slope ?

weqwewe [10]

Answer:

This slope means for every 1 minute Latonya swims 100 meters.

Step-by-step explanation:

5 0

3 years ago

Two buses leave a station at the same time and travel in opposite directions. One bus travels 18 mi/h faster than the other. If

ValentinkaMS [17]

Answer:

The distance each bus travels is given as d=tr where

- d is distance bus travels

- t is a time bus travels

- r is the speed of the bus

Distance first bus travels for 4 hours is d1=4r.

Distance other bus travels for 4 hours is d2=4(r+12).

The total distance between them is 480 miles and since they go in opposite directions this distance is the sum of distances each bus travels.

d1+d2=480

4r+4(r+12)=480

4r+4r+48=480

8r+48=480

8r=432

r=432/8

r=54 mph, this is a speed of the first bus

r+12=66 mph, this is the speed of the second bus

Hope this helps you!!!! :D

8 0

3 years ago