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Darina [25.2K]
3 years ago
8

HELP ME PLEASE!!! 2(b+3)-(7+b)=-7 ??

Mathematics
2 answers:
Effectus [21]3 years ago
6 0

<u>To solve this first distribute the 2, and then distribute the negative sign.</u>

2(b+3)-(7+b)=-7

2b+6-7-b=-7

<u>Combine like terms.</u>

2b+(-b)=b

6+(-7)=-1

b-1=-7

<u>Add 1 on both sides of the equation.</u>

b-1+1=-7+1

b=-6

Natasha2012 [34]3 years ago
4 0

2(b + 3) - (7 + b) = -7

2b + 6 - 7 - b = -7

b = -6 + 7 - 7

b = -6

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A coin is tossed and a standard number cube is rolled. What is the probability that the coin shows head and the number cube show
krok68 [10]

The total possibility that the head and even no on dice appears is 3. and total possible choice are 12 {head ---> (1,2,3,4,5,6) & tail ---> (1,2,3,4,5,6)}. so the probability is 3/12= 1/4.


C: 1/4

4 0
3 years ago
if a coin is tossed 4 times, the odds of it coming up either heads every time or tails every time are 1:7.What is the probabilit
ivanzaharov [21]

Answer:

1

Explanation:

From the question, we have it that the probability of heads coming up every time or tail coming up every time is 1:7 if the coin is tossed in 4 tosses

What this means is that we have a probability of 1/8 of head showing up and a probability of 7/8 that a tail will show up in each toss of the coin

For four throws, it means all four are heads or all four are tails

If all four are heads, we have the probability of this happening as:

\text{ (}\frac{1}{8})^{}

if all four are tails, we have the probability as:

\frac{7}{8}

Now, the probability of either heads or all tails after 4 tosses will be:

\text{ }\frac{1}{8}\text{ + }\frac{7}{8}\text{ = 1}

8 0
1 year ago
What is the value of x to the nearest<br> tenth?
Colt1911 [192]

Answer:

C. 17.6

General Formulas and Concepts:

<u>Math</u>

  • Rounding

<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  

Equality Properties

  • Multiplication Property of Equality
  • Division Property of Equality
  • Addition Property of Equality
  • Subtraction Property of Equality<u> </u>

<u>Trigonometry</u>

  • [Right Triangles Only] SOHCAHTOA
  • [Right Triangles Only] tanθ = opposite over adjacent

Step-by-step explanation:

<u>Step 1: Identify Variables</u>

Angle θ = 40°

Opposite Leg = <em>x</em>

Adjacent Leg = 21

<u>Step 2: Solve for </u><em><u>x</u></em>

  1. Substitute in variables [tangent]:                                                                   \displaystyle tan(40^\circ) = \frac{x}{21}
  2. [Multiplication Property of Equality] Isolate <em>x</em>:                                                \displaystyle 21tan(40^\circ) = x
  3. Rewrite:                                                                                                           \displaystyle x = 21tan(40^\circ)
  4. Evaluate:                                                                                                          \displaystyle x = 17.6211
  5. Round:                                                                                                            \displaystyle x \approx 17.6
6 0
2 years ago
Read 2 more answers
PLEASE HELP PLEASE PLEASE PLEASE
fiasKO [112]

Answer:

11,880π in^3

Step-by-step explanation:

The volume of a cylinder = π r^2 h

Large Cylinder V = π * 15^2*40 =  9,000π   in^3

Small Cylinder V = π * 12^2 * (60-40) =  2880π in^3

Adding: the total volume of the model = 11,880π in^3

7 0
3 years ago
Giả sử phương án tối ưu của bài toán mở rộng là x* = (-2,-3,0,1,2) với x5 là ẩn giả. Tìm phương án tối ưu xuất phát của bài toán
arlik [135]

Answer:

ask in English then I can help u

7 0
3 years ago
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