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3 years ago

Can u do 17-20 solve the equation please and show work

Mathematics

2 answers:

Stella [2.4K]3 years ago

7 0

17. 4n-8=5
8+5=13
13/4=3.25
n=3.25

18. n/2+ 5=15
15-5=10
10*2=20
n=20

19. 5v-42=73
73+42=115
115/5=23
v=23

20. 3d-13=11
11+13=24
24/3=8
d=8

Hope I helped☺☺

bija089 [108]3 years ago

4 0

Remember to follow PEMDAS: (Parenthesis, Exponents, Multiply, Divide, Add, Subtract)
- Also follow the equality rule (what you do to one side you do to the other)

17) 4n - 8 = 5
4n - 8 (+8) = 5 (+8)
4n = 13
4n/4 = 13/4
n = 13/4 or 3.25

18) n/2 + 5 = 15
n/2+ 5 (-5) = 15 (-5)
n/2 = 10
n/2(2) = 10(2)
n = 20

19) 5v - 42 = 73
5v - 42 (+42) = 73 (+42)
5v = 115
5v/5 = 115/5
v = 23

20) 3d - 13 = 11
3d - 13 (+13) = 11 (+13)
3d = 24
3d/3 = 24/3
d = 8

hope this helps

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The Barnes family has a coupon for 10% off their dinner. If their bill comes to $82.50 and they wish to tip 15%, what will they

satela [25.4K]

Answer:

Total cost= $86.25

Step-by-step explanation:

Giving the following information:

Discount= 10%

Nill= $82.5

Tip= 15%

First, we need to calculate the discounted price:

Discount price= 82.5 / 1.1= $75

Now, the tip:

Tip= 75*0.15= $11.25

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4 years ago

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4 years ago

Read 2 more answers

State the the roots of y=x^2+8x

Likurg_2 [28]

Answer:

The roots of the given equation are x = 0 and x = -8.

General Formulas and Concepts:

Algebra I

Terms/Coefficients

Factoring/Expanding

Quadratic Equations

Solving quadratic equations

Step-by-step explanation:

Step 1: Define

Identify.

y = x² + 8x

Step 2: Find Roots

[Quadratic] Factor: y = x(x + 8)
[Quadratic] Set up [Solve]: 0 = x(x + 8)
[Quadratic] Define: x = 0, -8

∴ the roots of the quadratic equation y = x² + 8x is equal to 0 and -8.

---

Topic: Algebra I

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3 years ago

If U = {x: X € N, 1 < × < 15)

Inessa05 [86]

Answer:

Step-by-step explanation:

Given:

U = {x: X € N, 1 < × < 15) = {1,2,3,4,5,6,7,8,9,10,11,12,13,14,15}

A = {2,4,6,8,10,12,14}

B = {3,6,9,12,15}

C = {5,10,15}

(a) Verify A(BnB)=(AUB)(AUB)

A U (B n B)

= {2,4,6,8,10,12,14} U ( {3,6,9,12,15} n {3,6,9,12,15} )

= {2,4,6,8,10,12,14} U {3,6,9,12,15}

= {2,3,4,6,8,9,10,12,14,15}

( A U B) n (A U B)

= {2,3,4,6,8,9,10,12,14,15} n {2,3,4,6,8,9,10,12,14,15}

= {2,3,4,6,8,9,10,12,14,15}

Therefore

A U (B n B) = ( A U B) n (A U B)

verifies

(b) Verify An(BUC)=(AnB)u(AnC)

A n ( B U C)

= {2,4,6,8,10,12,14} n ( {3,6,9,12,15} U {5,10,15} )

= {2,4,6,8,10,12,14} n {3,5,6,9,10,12,15}

= {6,10,12}

( A n B ) U ( A n C )

= ( {2,4,6,8,10,12,14} n {3,6,9,12,15} ) U ( {2,4,6,8,10,12,14} n {5,10,15} )

= {6,12} U {10}

= {6,10,12}

Therefore

A n ( B U C) = ( A n B ) U ( A n C )

verifies

AU(BUC)

= {2,4,6,8,10,12,14}U{3,6,9,12,15}U{5,10,15}

= {2,3,4,5,6,8,9,10,12,14,15}

(AUB)U(AUC)

= ({2,4,6,8,10,12,14}{3,6,9,12,15})U({2,4,6,8,10,12,14}U{5,10,15})

= {2,3,4,6,8,9,10,12,14,15}U{2,4,5,6,8,10,12,14,15}

= {2,3,4,5,6,8,9,10,12,14,15}

Therefore

AU(BUC)=(AUB)U(AUC)

verifies

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3 years ago

A passenger jet flies at an average speed of 548 miles per hour. At that speed, how many miles does the plane travel in 4 hours?

marishachu [46]

The plane travels 2192 miles.

You’re multiplying 548 x 4 because the plane travels 548 an hour.

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3 years ago