All categories

3 years ago

How many oz. of a metal containing 40%

Mathematics

1 answer:

RideAnS [48]3 years ago

3 0

Answer:

3 oz

Step-by-step explanation:

Let x represent the number of oz. of the medal with 40% gold:

Set up an equation and solve for x:

0.4x + 7(0.9) = 0.75(x + 7)

0.4x + 6.3 = 0.75x + 5.25

6.3 = 0.35x + 5.25

1.05 = 0.35x

3 = x

So, you will need 3 oz. of the metal with 40% gold

You might be interested in

Simplify the expression.20 • 5–2

DochEvi [55]

Hello!

Simplifying an expression is putting in its simplest form.

You do 20 * 5 = 100

Then 100 - 2 = 98

The simplest form of the expression is 98

The answer is 98

Hope this helps!

5 0

4 years ago

Read 2 more answers

100 POINTS EZ |

ehidna [41]

Area of the quadrilateral=1/2×diagonal×(sum of perpendiculars)

Put the values

Area:-

$\\ \rm\Rrightarrow \dfrac{1}{2}(24)(8+13)$

$\\ \rm\Rrightarrow 12(21)$

$\\ \rm\Rrightarrow 252m^2$

7 0

2 years ago

Read 2 more answers

3/4(8x-4)=7x+2 This is a linear equation please help!

aleksandrvk [35]

Simplify the left hand side by multiplying the terms in the parenthesis by 3/4, i.e. divide them by 4 and multiply them by 3:

$\dfrac{3}{4}(8x-4)=7x+2 \iff 3(2x-1)=7x+2 \iff 6x-3 = 7x+2$

Subtract 6x from both sides:

$-3=x+2$

Subtract 2 to both sides:

$x=-5$

4 0

3 years ago

Read 2 more answers

What is an estimate of 23 times 67

Ber [7]

What is an estimate of 23 times 67
1,500

8 0

3 years ago

3<br>Find the value of a <br>in the equation,(3+4√3)(2-a√3)=-18+2√3

ankoles [38]

Given:

The equation is:

$\left(3+4\sqrt{3}\right)\left(2-a\sqrt{3}\right)=-18+2\sqrt{3}$

To find:

The value of a.

Solution:

We have,

$\left(3+4\sqrt{3}\right)\left(2-a\sqrt{3}\right)=-18+2\sqrt{3}$

On simplification, we get

$(3)(2)+(4\sqrt{3})(2)+(3)(-a\sqrt{3})+(4\sqrt{3})(-a\sqrt{3})=-18+2\sqrt{3}$

$6+8\sqrt{3}-3a\sqrt{3}-4a(3)=-18+2\sqrt{3}$

$6+8\sqrt{3}-3a\sqrt{3}-12a=-18+2\sqrt{3}$

$(6-12a)+(8-3a)\sqrt{3}=-18+2\sqrt{3}$

On comparing both sides, we get

$6-12a=-18$

$-12a=-18-6$

$a=\dfrac{-24}{-12}$

$a=2$

And,

$8-3a=2$

$-3a=2-8$

$a=\dfrac{-6}{-3}$

$a=2$

Therefore, the value of a is 2.

3 0

3 years ago