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MissTica
3 years ago
6

30 - -5n + 16 + 3n =

Mathematics
1 answer:
MatroZZZ [7]3 years ago
7 0

Answer:

8n + 46

Step-by-step explanation:

Combine like terms. First, simplify the signs. two negatives directly next to each other equals one positive:

- (-5n) = + 5n

30 + 5n + 16 + 3n = (30 + 16) + (5n + 3n)

(30 + 16) = 46

(5n + 3n) = 8n

8n + 46 is your answer.

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If f(x) = startfraction 7 over x endfraction, then what is the slope of f(x) at x = 5? round your answer to 3 decimal places.
Flura [38]

The slope of the function to 3 dp is 0.280

<h3>Slope of a function</h3>

Slope is also known as the gradient of a function

Given the function f(x) =\frac{7}{x}

Taking the derivative of the function will give:

f'(x)=-\frac{7}{x^2}

Substitute x = 5 into the equation to have:

f'(x)=-\frac{7}{5^2}

f'(x) = -\frac{7}{25}

Hence the slope of the function to 3 dp is 0.280

Learn more on slope of function here: brainly.com/question/405397

4 0
2 years ago
What is an equation in point-slope form for the line that passes through the points (-3,5) and (2, -3)?
zloy xaker [14]

Answer:

y - 5 = -8/7(x + 3)

General Formulas and Concepts:

<u>Pre-Algebra</u>

Order of Operations: BPEMDAS

  1. Brackets
  2. Parenthesis
  3. Exponents
  4. Multiplication
  5. Division
  6. Addition
  7. Subtraction
  • Left to Right

<u>Algebra I</u>

Slope Formula: m=\frac{y_2-y_1}{x_2-x_1}

Point-Slope Form: y - y₁ = m(x - x₁)  

  • x₁ - x coordinate
  • y₁ - y coordinate
  • m - slope

Step-by-step explanation:

<u>Step 1: Define</u>

Point (-3, 5)

Point (2, -3)

<u>Step 2: Find slope </u><em><u>m</u></em>

Simply plug in the 2 coordinates into the slope formula to find slope <em>m</em>

  1. Substitute [SF]:                    m=\frac{-3-5}{2+5}
  2. Subtract/Add:                      m=\frac{-8}{7}

<u>Step 3: Write Equation</u>

<em>Plug in variables into the general form.</em>

y - 5 = -8/7(x + 3)

y + 3 = -8/7(x - 2)

3 0
3 years ago
If a/4= b/7 what is the value of a-b/b
eimsori [14]

Answer:

a = b*4/7

a-b/b

=4b/7 -b /b

=(4b-7b)/7 /b

=-3b/7 / b

cancelling b,

= -3/7

7 0
3 years ago
Solve for x.<br> 18x - 12<br> 16x +8<br> x = [?]
rodikova [14]

Answer: x = 10;

Both the angles are congruent, therefore;

8x - 12 = 6x + 8

=> Now subtract 6x from each side of "="

2x - 12 = 8

=> Add 12 to each side;

2x = 20

=> Lastly divide each side by 2;

<u>x = 10</u>

Hope this helps!

7 0
3 years ago
Read 2 more answers
Ethan buys a video game on sale. If the video game usually costs $39.99, and it was on sale for 20% off, how much did Ethan pay?
Ann [662]
Hello There!

Ethan would pay $31.99  or rounded up two 32 which ever is your answer choice 

Thus being why.

if you times 39.99 x .20 you get 7.998

39.99 - 7.998 is 31.99

Hope This Helps!
7 0
4 years ago
Read 2 more answers
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