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Leto [7]
4 years ago
6

Brass is made from a mixture of copper and other elements. A mixture that is 80% copper is combined with a mixture that is 60% c

opper, resulting in 100 pounds of brass that is 65% copper.
Which equation can be used to find x, the amount of 60% mixture used to create the 65% mixture?
Mathematics
1 answer:
8090 [49]4 years ago
7 0

Answer: 0.8(100 – x) + 0.6x = 100(0.65)

Step-by-step explanation: i got it right on edgenuity

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Jesse earns $12.62 an hour, plus she earns overtime for hours exceeding 40 hours per week. What is her gross weekly pay for work
vladimir2022 [97]
The correct answer is c) $637.31

12.62 x 40 = 504.8

time and a half is the amount you get paid + half the amount you get paid 

so half of 12.62 is 6.31 + 12.62 = 18.93

18.93 x 7 = 132.51

504.8 + 132.51 = 637.31
8 0
3 years ago
Please HELP best answer will receive a BRAINLIEST. Given the probability density function f ( x ) = 1/3 over the interval [ 4 ,
olga55 [171]

Answer:

Step-by-step explanation:

Assume that f(x) = 0 for x outside the interval [4,7]. We will use the following

E[X^k] = \int_{4}^{7}x^k f(x) dx

Var(X) = E[X^2]- (E[X])^2

Standard deviation = \sqrt[]{Var(X)}

Mean = E[X]

Then,

E[X] = \int_{4}^{7}\frac{1}{3}dx = \frac{7^2-4^2}{2\cdot 3} = \frac{11}{2}

E[X^2] = \int_{4}^{7}\frac{x^2}{3}dx = \frac{7^3-4^3}{3\cdot 3} = 31

Then, Var(x) = 31-(\frac{11}{2})^2 = \frac{3}{4}

Then the standard deviation is \frac{\sqrt[]{3}}{2}

7 0
3 years ago
What is 4×[(5×3)+(24 4)]=84
Law Incorporation [45]

There are no variables, and you've included the answer already, so I'm not sure what you're asking for..

4 0
3 years ago
Convert from Decimal Notation to Scientific Notation
a_sh-v [17]

Answer:

Hence, 12,90,000 can be expressed as $1.29 \times 10^{6}$.

Step-by-step explanation:

- Given 12,90,000

- Use given, move the decimal point so that first factor is greater than or equal to 1 but less than 10 .

- Then count n and write in scientific notation.

Step 1 of 1

Consider 12,90,000

1.29

So, 1.29 lies between 1 & 10.

Now, Decimal moved to 6 places at left.

$1.29 \times 10^{6}$

So, $12,90,000=1 \cdot 29 \times 10^{6}$.

7 0
2 years ago
Zora has bag of potting
Xelga [282]

The question is missing the figure which is attached below.

Answer:

The last box that has dimensions 8 in × 8 in × 10 in

Step-by-step explanation:

Given:

Volume of the soil = 924 cubic inches.

There are four different types of boxes that need to be checked whether they can accommodate all of the soil or not.

The volume of the box must be at least 924 cubic inches to accommodate all of the soil.

Now, volume of the first box is given as:

V_1=l\times b\times h=20\times 5\times 10=1000\ in^3>924\ in^3

Volume of the second box is given as:

V_2=l\times b\times h=10\times 10\times 10=1000\ in^3>924\ in^3

Volume of the third box is given as:

V_3=l\times b\times h=10\times 20\times 6=1200\ in^3>924\ in^3

Volume of the fourth box is given as:

V_4=l\times b\times h=8\times 8\times 10=640\ in^3

Therefore, only the volume of the fourth box is less than the total volume of the soil. So, last box is the correct option.

6 0
3 years ago
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