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Len [333]
3 years ago
11

What is the value of x?

Mathematics
1 answer:
Alenkinab [10]3 years ago
4 0

Answer:

X=5

Step-by-step explanation:

Add all up all the xs you see and the numbers near it and then it will be x and that number added up all together

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A chemist has two alloys, one of which is 5% gold and 20% lead and the other which is 30% gold and 50% lead. How many grams of e
dmitriy555 [2]

The amount of the first alloy is 450 grams and the amount of the second alloy is 30 grams.

<h3>What is a linear equation?</h3>

It is defined as the relation between two variables, if we plot the graph of the linear equation we will get a straight line.

If in the linear equation, one variable is present, then the equation is known as the linear equation in one variable.

We have:

A chemist has two alloys, one of which is 5% gold and 20% lead and the other which is 30% gold and 50% lead.

Let's suppose the x is the amount of the first alloy and y is the amount of the second alloy:

We can make two linear equation in two variables:

0.05x + 0.3y = 31.5  ...(1)

0.2x + 0.5y = 105  ...(2)

After solving the above two linear equations by substitution method, we get:

x = 450 grams

y = 30 grams

Thus, the amount of the first alloy is 450 grams and the amount of the second alloy is 30 grams.

Learn more about the linear equation here:

brainly.com/question/11897796

#SPJ1

3 0
2 years ago
What is the correct letter? (Giving brainliest)
vampirchik [111]

Answer:

d is the answer

Step-by-step explanation:

perimeter of rect = 2(7+3) = 20

perimeter of square = 4 a =20

a = 5

3 0
2 years ago
11) Endpoint: (0,4), midpoint (-10, -3)<br> Find the endpoint?
earnstyle [38]

Answer:

(-20,-10)

Step-by-step explanation:

( - 10 \:  \:  - 3) = ( \frac{0 + x}{2}  \:  \:  \frac{4 + y}{2} )

Solve for.x coordinate

- 10 =  \frac{0 + x}{2}  \\  - 20 = 0 + x \\ x =  - 20

solve for y coordinate

- 3 =  \frac{4 + y}{2}  \\  - 6 = 4 + y \\  - 10 = y

5 0
3 years ago
Find the perimeter of this rectangle. 9cm 5cm
OLEGan [10]

Answer:

perimeter of rectangle = 2(l+b)

= 2 (9+5)

= 2 X 14

= 28 cm

is the perimeter of rectangle

8 0
3 years ago
Read 2 more answers
This is adding and subtracting rational expressions. i don’t know how to do this one
Sindrei [870]

Answer:

1

Step-by-step explanation:

1-0=1 totally trust me

5 0
2 years ago
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