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Sonbull [250]
3 years ago
12

-10+5=7x-4how to i explain this step by step​

Mathematics
2 answers:
olasank [31]3 years ago
8 0

Answer:

5/7 x 4 = 2.8571 in decimal form.

o-na [289]3 years ago
6 0

Answer:

x = -1/7

Step-by-step explanation:

Isolate the variable, x. Note the equal sign, what you do to one side, you do to the other. Do the opposite of PEMDAS.

PEMDAS =

Parenthesis

Exponents (& Roots)

Multiplication

Division

Addition

Subtraction

& is the order of operation.

First simplify the expression to the left: -10 + 5 = 5 - 10 = -5

-5 = 7x - 4

Next, isolate the variable, x. Do the opposite of PEMDAS. Add 4 to both sides:

-5 (+4) = 7x - 4 (+4)

-5 + 4 = 7x

-1 = 7x

Divide 7 from both sides:

(-1)/7 = (7x)/7

-1/7 = x

x = -1/7

~

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Find the area and perimeter.<br> The area is ... and the perimeter is ...
Schach [20]

Answer:

Area: 6a^2

Perimeter: 12a^2

Step-by-step explanation:

To find the area of a triangle, use the formula A=1/2 b*h. The base is 3a^2 and the height is 4a^2.

A= 1/2 (3a^2)(4a^2)

A = 1/2 (12a^4)

A = 6a^4

To find the perimeter of the triangle, add each of the sides of the triangle. The third side, the hypotenuse, can be found using Pythagorean theorem.

a^2+b^2=c^2\\(3a^2)^2+(4a^2)^2 = c^2\\(9a^4)+(16a^4)=c^2\\25a^4=c^2\\5a^2=c

Now add each of the sides: 3a^2 + 4a^2 +5a^2 = 12a^2

7 0
3 years ago
What is the mean of this data?<br><br> 12, 18, 11, 25, 38, 22
yanalaym [24]
Your answer is 21 for this one.
3 0
3 years ago
What are the solutions 2x^2 +7x=4
elena55 [62]
So your equation is 2x^{2} +7x = 4. You need to simplify this answer.
So first off, do 2x times 2x.
2 x 2 = 4.
Your equation is now 4x + 7x = 4.
You're already off to a great start, so now let's add 4x + 7x. It is 11x.
Your equation is almost done! It's 11x = 4 right now.
Divide both sides by 11, and your answer is...
0.36363636 and so on, or you can round to the nearest hundreth, in which it will be

0.36.

I hope I helped!
8 0
2 years ago
Read 2 more answers
8x+10y=<br> 8x+10y=<br> \,\,70<br> 70
notsponge [240]

Answer:

54

Step-by-step explanation:

4 0
3 years ago
Please help! It's due soon.
Sedbober [7]

Answer:

Because f(g(x)) = g(f(x)) = x, f and g <u>are </u> inverse functions.

Step-by-step explanation:

f(g(x)) = f(\frac{1}{4}\sqrt{x}) = 16(\frac{1}{4}\sqrt{x} ) ^{2} = 16(\frac{1}{16}x)=x

g(f(x)) = g (16x^{2}) = \frac{1}{4}\sqrt{16x^{2} } = \frac{1}{4}(4x) = x

6 0
3 years ago
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