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Burka [1]
4 years ago
8

Find x. Do not round your answer.

Mathematics
2 answers:
posledela4 years ago
8 0

Answer:

x=12cm

Step-by-step explanation:

PA ×PB=PT^2

4×(4+x)=(8)^2

16+4x=64

4x=64-16

4x=48

x=12cm

Ratling [72]4 years ago
5 0

Answer:

x =12

Step-by-step explanation:

(whole secant) x (external part) = (tangent)^2

(4+x) * 4 = 8^2

Distribute

16+4x = 64

Subtract 16 from each side

4x = 48

Divide each side by 4

4x/4 = 48/4

x = 12

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The length of a piece of ribbon is 1m 15cm. find the length of 5 such pieces.​
erma4kov [3.2K]

Answer:

575 cm

Step-by-step explanation:

5 * 100 = 500

15*5=75

500+75 = 575

7 0
3 years ago
4x – 1 = 7x – 16<br><br> Solve the problem <br> (Show your work)
Katarina [22]

Answer:

x = 5

General Formulas and Concepts:

<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

Step-by-step explanation:

<u>Step 1: Define equation</u>

4x - 1 = 7x - 16

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

  1. Subtract 4x on both sides:                    -1 = 3x - 16
  2. Add 16 to both sides:                             15 = 3x
  3. Divide 3 on both sides:                          5 = x
  4. Rewrite:                                                   x = 5

<u>Step 3: Check</u>

<em>Plug in x into the original equation to verify it's a solution.</em>

  1. Substitute in <em>x</em>:                    4(5) - 1 = 7(5) - 16
  2. Multiply:                               20 - 1 = 35 - 16
  3. Subtract:                              19 = 19

Here we see that 19 does indeed equal 19.

∴ x = 5 is a solution to the equation.

6 0
3 years ago
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Collin is collecting rocks for a science project. So far, he has collected 36 rocks, which is 90% of the total he needs. How man
kati45 [8]

Answer:

40 total rocks

Step-by-step explanation:

100 * 36 / 90 = 40

3 0
3 years ago
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Please help...its for Delta math. will mark brainliest and I will be ur friend♥<br>​
REY [17]

The exponential functions change is represented by decay and the percentage rate of decrease is 1.00619%.

Step-by-step explanation:

Step 1:

To determine if the function represents growth or decay, we substitute values to x.

If the values increase with an increase of x, it represents growth.

If the values decrease with an increase of x, it represents decay.

Step 2:

If x= 10, y = 1,300 (\frac{1}{2})^{\frac{10}{69} }  =  1,300 (0.9044) = 1,175.72.

If x=11,y = 1,300 (\frac{1}{2})^{\frac{11}{69} }  =  1,300 (0.8953) = 1,163.89.

So as x increases the value of y decreases, so it represents decay.

Step 3:

The percentage rate of change is determined by dividing the difference of two consecutive values by the first value.

The percentage rate of change = \frac{y(x=11) - y(x=10)}{y(x=10)}.

Substituting the values, we get

The percentage rate of change =\frac{1,175.72-1,163.89}{1,175.72}(100) = 1.00619\%.

As the values of y decrease with an increase in x, it is the percent decrease per unit.

5 0
4 years ago
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Tony is building a doghouse and the front
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Answer:

and the front what can you post more or is that the question if so good for him to build his dog a house

Step-by-step explanation:

6 0
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