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jonny [76]
3 years ago
15

Simplify the expression: 5(4x+3)-2x ​

Mathematics
1 answer:
Naddika [18.5K]3 years ago
8 0

Answer:

18x +15

Step-by-step explanation:

5(4x+3)-2x

Distribute

20x +15 -2x

Combine like terms

18x +15

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When given an algebraic expression involving subtraction, why is it best to rewrite the expression using addition before identif
Ray Of Light [21]
Usually when you do expressions involving subtraction you can do Keep, Change ,Change
That means you keep the sign of the first number and change the other two signs.
It is best you rewrite the expression to addition because a lot of people don't do well with subtracting .
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Help please :(??? I need an answer
Alecsey [184]

Answer:

C. $23 per day.

Step-by-step explanation:

The equation given is in slope-intercept form: y = mx + b, where m is the rate of change (slope).

In the given equation, m = 23, therefore, the rate of change is 23 units (in this case, dollars per day).

Hope this helps!

8 0
3 years ago
Max has 5.50. He has eight more quarters than he does nickels. He had four times as many dimes as he has nickels. How many quart
Oliga [24]

Answer:

<h2>There are 13 quarters, 5 nickels and 20 dimes.</h2>

Step-by-step explanation:

Givens

  • Max has $5.50.
  • He has eight more quarters than he does nickels.
  • He had four times as many dimes as he has nickels.

From these statements, we can deduce algebraical expressions to solve the problem. Let's call q quarters, n nickels and d dimes.

q=n+8 (8 more quarters than nickels)

d=4n (he has four times as many dimes as he has nickels).

0.25q+0.05n+0.10d=5.50 (Max has a total of $5.50, one quartes is $0.25, one nickel is $0.05 and one dime is $0.10).

Let's replace the first two expressions into the third equation

0.25(n+8)+0.05n+0.10(4n)=5.50\\0.25n+2+0.05n+0.40n=5.50\\0.70n=5.50-2\\n=\frac{3.50}{0.70}\\ n=5

There are 5 nickels.

Now, we use this value to find the number of quarters

q=5+8=13

There are 13 quarters.

Also, d=4(5)=20

There are 20 dimes.

Therefore, there are 13 quarters, 5 nickels and 20 dimes.

3 0
3 years ago
What is the surface area of the pyramid whose net is shown here?
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Urface area  = area of the square + area of the 4 triangles

= 6*6 + 4(1/2*6*6)  

= 36 + 4 * 18  = 108 sq cms
4 0
3 years ago
HELP ME PLEASE THANKS
Anika [276]
The ^3 and ^2 are exponents sorry I don’t think you can type exponents on a keyboard, 6x^3+22x^2+3x-6
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3 years ago
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