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dezoksy [38]
3 years ago
12

8. 3x+10=14y 8х -7y= 34

Mathematics
1 answer:
Fofino [41]3 years ago
3 0

Answer:

hey, are these two questions or one simultaneous question?

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Evaluate \dfrac{e}{4}+2f-3 4 e ​ +2f−3 when e=12e=12 and f=\dfrac12f= 2 1 ​ .
Verdich [7]

Answer: -406

Step-by-step explanation:

We have the following expression:

\frac{e}{4}+2f-34e+2f-3

In addition we know:

e=12 and f=\frac{1}{2}

If we substitute this in the expresion, we will have:

\frac{12}{4}+2(\frac{1}{2})-34(12)+2(\frac{1}{2})-3=-406

4 0
3 years ago
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Scores
devlian [24]

Mean=5

Step-by-step explanation:

add the numbers given and divide it by the number of numbers given

3 0
3 years ago
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Which of the following describes the decimal .3? Repeating decimal Terminating decimal Circulating decimals Repeating factor? Th
drek231 [11]

Answer:

Repeating decimal

Step-by-step explanation:

The bar over any number to the right of a decimal point denotes that the number is recurring. Meaning that if the bar (line) is over the number 3 in 0.3, the number 3 is being repeated infinitely. (0.333333333333333333....)

These types of decimals are known as repeating or recurring decimals.

Hope this helps!

4 0
3 years ago
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A parcel delivery service will deliver a package only if the length plus girth​ (distance around) does not exceed 84 inches. ​(A
Kisachek [45]

Answer:

A. 14x14x28

B. The maximum volume is 5488 cuibic inches

Step-by-step explanation:

The problem states that the box has square ends, so you can express volume with:

v=x^{2} y

Using the restriction stated in the problem to get another equation you can substitute in the one above:

4x+y=84\\\\

Substituting <em>y</em> whit this equation gives:

v=x^{2} (84-4x)\\\\v=84x^{2} -4x^{3}

Now find the limit of <em>x</em>:

\frac{84x^{2}-4x^{3}}{dx}=168x-12x^{2}\\\\x=\frac{168}{12}=14

Find the length:

y=84-4(14)=28

You can now calculate the maximum volume:

v=(14)^{2}(28)= 5488

6 0
3 years ago
I need help fast what is 9m−​(3+7​m) simplified?
iogann1982 [59]

Answer:

Simplifying 9m + -3 + -7m = 0

Reorder the terms: -3 + 9m + -7m = 0

Combine like terms: 9m + -7m = 2m -3 + 2m = 0 Solving -3 + 2m = 0

Solving for variable 'm'. Move all terms containing m to the left, all other terms to the right.

Add '3' to each side of the equation. -3 + 3 + 2m = 0 + 3 Combine like terms: -3 + 3 = 0 0 + 2m = 0 + 3 2m = 0 + 3 Combine like terms: 0 + 3 = 3 2m = 3

Divide each side by '2'. m = 1.5

Step-by-step explanation:

Hope this helps :)

4 0
3 years ago
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