1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
kaheart [24]
3 years ago
11

1/2s=4s-21 please show steps

Mathematics
1 answer:
omeli [17]3 years ago
4 0

Answer:

s = 6

Step-by-step explanation:

Goal is to isolate the variable (s)

1/2s = 4s - 21

Subtract 4s from both sides - this cancels out the 4s on the right side and moves it to the left side

1/2s - 4s = -21

To add or subtract fractions, they must have a common denominator

Convert 4s to a fraction over 2

1/2s - 8/2s = -21

Subtract the numerators and keep the denominators

-7/2s = -21

Remember the goal is to isolate the variable

In order to get rid of the -7/2, we multiply by its reciprocal (which is -2/7)

What we do to one side, we must do to the other (this means multiply by -2/7 on both sides

-7/2s × -2/7 = -21 × -2/7

s = -21 × -2/7

Negative × negative = positive

s = 42/7

Divide 42 by 7

s = 6

You might be interested in
Help pls fast and give me the steps<br> -15a-19-35=-84
Nimfa-mama [501]

Answer:

a=2

Step-by-step explanation:

-15a-19-35=-84

-15a-19=-49

-15a=-30

a=2

8 0
3 years ago
17.a. Three numbers have HCF of 12 and LCM 720. If two of the
ivolga24 [154]

Answer:

Yes it is true and 4 mark not ture

Step-by-step explanation:

3 0
3 years ago
Which figures are polygons
Tatiana [17]
The answer is A. A, D the reason being, is because polygons have sides C, and B have no sides so we can eliminate those immediately.
5 0
3 years ago
Could some one pllz give me real answers
timofeeve [1]

Answer:

See below

Step-by-step explanation:

You just need 1/4 of everything:

1/4 c peanut butter

1/4 c brown sugar

1/4 c gran sugar

1/4 c butter

1/2 egg

1/4 tsp baking soda

1/4 tsp baking powder

1/4 tsp vanilla

5/8 c flour

8 0
3 years ago
Read 2 more answers
Lim x--&gt; 0 (e^x(sinx)(tax))/x^2
Tom [10]

Make use of the known limit,

\displaystyle\lim_{x\to0}\frac{\sin x}x=1

We have

\displaystyle\lim_{x\to0}\frac{e^x\sin x\tan x}{x^2}=\left(\lim_{x\to0}\frac{e^x}{\cos x}\right)\left(\lim_{x\to0}\frac{\sin^2x}{x^2}\right)

since \tan x=\dfrac{\sin x}{\cos x}, and the limit of a product is the same as the product of limits.

\dfrac{e^x}{\cos x} is continuous at x=0, and \dfrac{e^0}{\cos 0}=1. The remaining limit is also 1, since

\displaystyle\lim_{x\to0}\frac{\sin^2x}{x^2}=\left(\lim_{x\to0}\frac{\sin x}x\right)^2=1^2=1

so the overall limit is 1.

4 0
3 years ago
Other questions:
  • A ratio that compares a quantity to 100 is a/an....
    7·1 answer
  • If it passes through (6,-5) and m=2/3 solve for y , how would this be solved
    11·2 answers
  • May is making bracelets. She has A piece of string that is 12 1/4 inches long. She gets off a piece that is 8 3/4 inches long. H
    6·1 answer
  • What is 6 times 2/3 (two thirds)?
    12·2 answers
  • Solve for 19= -3a -5
    7·2 answers
  • What fraction does this number-line show? (I Put a Picture)
    14·2 answers
  • Expand and simplify (x − 2)(x - 1)​
    10·2 answers
  • Find cos B in the triangle
    5·1 answer
  • What is the area of the shower floor ?
    6·1 answer
  • PLSSS HELP THIS IS HARD ANYONE
    10·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!