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BabaBlast [244]
2 years ago
7

Need help with 21-23 you suppose to simplify the expression

Mathematics
1 answer:
lora16 [44]2 years ago
7 0

To solve these problems, we must remember the distributive property. This property states that a coefficient being multiplied by a polynomial in parentheses is equal to the sum of the coefficient times each of the separate terms. Using this knowledge, let's begin with number 21:

-(4x + 17) + 3(7-x)

To begin, we should distribute the negative sign through the first set of parentheses and the coefficient of positive 3 through the second set of parentheses.

-4x - 17 + 21 - 3x

Next, we must combine like terms, or add/subtract the constants terms and the variable terms in order to create a more concise expression.

-7x + 4 (your answer)

Now, we can move on to question 22 and solve it in a similar manner:

7(2n-8) - 4(12 - 8n)

Again, we will distribute the coefficients through the parentheses. However, keep in mind that the coefficient in front of the second set of parentheses is actually a NEGATIVE 4, so we must distribute the negative as well.

14n - 56 - 48 + 32n

Next, we will combine like terms (add the n terms together and subtract the constant terms).

46n - 104

Now, we can solve problem 23:

8 + 2(5f - 3)

We will again distribute through the parentheses:

8 + 10f - 6

Combine like terms after that:

10f + 2

Therefore, your answers for the three problems are as follows:

21) -7x + 4

22) 46n - 104

23) 10f + 2

Hope this helps!

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I need help please ASAP
strojnjashka [21]

Answer:

1. 2, 3

2. 3, 7

3. 5, 2

4. 16, -10

Step-by-step explanation:

1. y=y       x+1=y=4x-5         x+1=4x-5           3x=6   x=2    y=3

2. x+y = 10      y=10-x     y=y    3x-2=10-x    4x=12 x=3  y=7

3. y=7-x   x-(7-x)=3    x-7+x=3     2x=10    x=5   y=2

4. y=6-x      2x+(6-x)=10      x+6=10    x=16    y=-10

6 0
3 years ago
What is 26/50 as a percent
posledela
26/50 as percent 

To convert fraction to percent you have to divide the numerator by the denominator and multiply the decimal by 100. 

≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡

Calculations

26/50

1)  26 ÷ 50 =  0.52 

2) 0.52 x 100 = 52 

3) 52 is the percent. 

ANSWER = 52%

4 0
3 years ago
Read 2 more answers
Word problem
nordsb [41]

Answer:

The answer is T = 25

Step-by-step explanation:

Hope this helps

6 0
3 years ago
(PLEASE HELP! WILL MARK BRAINLIEST!!!!)
Delvig [45]

Answer:

false and sum of the three angles of any triangle is equal to 180 degrees.

Step-by-step explanation:

5 0
3 years ago
What is the simplified form of 6n-17p-10n-9p6n−17p−10n−9p -4n - 4p 16n - 8p 16n - 26p -4n - 26p
Travka [436]

Answer:

−60n−116p

Step-by-step explanation:

5 0
2 years ago
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