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frutty [35]
3 years ago
7

Brass is an alloy of zinc and copper. if 30%of the content is zinc, find the weight of zinc and copper in 300 grams of brass​ if

​
Mathematics
1 answer:
Marina86 [1]3 years ago
8 0

Answer:

Socratic app

Step-by-step explanation:

it will help you

You might be interested in
There are 740 tickets purchased for a Major League Baseball game. The lower reserved tickets cost $9.50 and the upper reserve co
artcher [175]

375 lower reserved tickets were purchased and 365 upper reserved tickets were purchased

Step-by-step explanation:

Let x be the number lower reserved tickets

and

y be the number of upper reserved tickets

Then according to given statements

x+y = 740\ \ \ \ Eqn\ 1\\9.50x+8y = 6482.50\ \ \ \ Eqn\ 2

From equation 1:

x = 740-y

Putting in equation 2

9.5(740-y)+8y = 6482.50\\7030-9.5y+8y = 6482.50\\7030-1.5y = 6482.50

Subtracting 7030 from both sides

7030-7030-1.5y = 6482.50-7030\\-1.5y=-547.5

Dividing both sides by -1.5

\frac{-1.5y}{-1.5} = \frac{-547.5}{-1.5}\\y = 365

Putting y = 365 in equation 1

x+365 = 740\\x = 740 - 365\\x = 375

Hence,

375 lower reserved tickets were purchased and 365 upper reserved tickets were purchased

Keywords: Linear equations, Variables

Learn more about linear equations at:

  • brainly.com/question/11207748
  • brainly.com/question/11280112

#LearnwithBrainly

3 0
3 years ago
I need help with this one!
kicyunya [14]
The answer is B! Your welcome if you need anymore help message me for more questions!
7 0
3 years ago
Can you help me plz ?
Alexxx [7]

Given: 30 total days and there were 6 days with rain with a temperature below 70 degrees

To find the percentage, divide the part (6 days) by the whole (30 days) then multiply the quotient by 100.

(6 days / 30 days) x 100 = 20%

20% of the days in June had a temperature below 70 degrees and had rain.

7 0
3 years ago
Read 2 more answers
7th grade math help me please :)
Yuliya22 [10]

Answer:

$288

Step-by-step explanation:

16+8=24

$24 per book

24 x 12 = 288

7 0
3 years ago
The value of x from the set {1, 3, 5, 7} that holds true for the equation is?
Vilka [71]

The value of x from the given set of values is 5

<h3>Area and perimeter of a rectangle</h3>

A rectangle is a 2 dimensional shape with 4 sides and angle. The formula for calculating the area and perimeter is given as:

Area = length * width

Perimeter = 2(length + width)

If the length of a rectangle is 2 inches more than its width and the perimeter of the rectangle is 24 inches, the resulting equation will be:

2x + 2(x + 2) = 24,

Expand and determine the value of "x"

2x+ 2x + 4 = 24

4x + 4 = 24

Subtract 4 from both sides

4x = 24 - 4

4x = 20

Divide both sides by 4

4x/4 = 20/4

x = 5

Hence the value of x from the given set of values is 5

Learn more on linear equation here: brainly.com/question/14323743

#SPJ1

Complete question

<em>The length of a rectangle is 2 inches more than its width. The perimeter of the rectangle is 24 inches. The equation </em><em>2x + 2(x + 2) = 24,</em><em> where x is the width in inches, represents this situation. The value of x from the set {1, 3, 5, 7} that holds true for the equation is . So, the width of the rectangle is inches and its length is inches.</em>

6 0
2 years ago
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