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Vladimir [108]
3 years ago
11

Please help I need to know what X is.

Mathematics
1 answer:
Sav [38]3 years ago
7 0

Answer:

14

Step-by-step explanation:

We can find the value of x using similarity ratio

(2x-7)/57 = (x+4)/51 cross multiply expressions

51×(2x-7) = 57×(x+4)

102x - 357 = 57x + 228

102x - 57x = 228 + 357

45x = 585 divide both sides with 45

x = 13

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Please help on one math question
kipiarov [429]

Hello from MrBillDoesMath!

Answer:

225

Discussion:

Sum ( 2n - 1)                  from  n = 1 to 15              

= Sum(2n) - Sum(1)        from n = 1 to 15

= 2 Sum(n) - Sum(1)       from n = 1 to 15

= 2* 15(15+1)/2  - (1 + 1 + .. + 1)

The first value comes from the fact that the sum of the first n integers is  n(n+1)/2. The latter value sums 15 1's.

= 2 * 15 * 16/2 - 15                    => 2/2 = 1

= 15*16 - 15                               => 15*16 = 240

= 240 - 15

= 225

Thank you,

MrB

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3 years ago
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A student was given two data sets, Set A and Set B. Which of the following statements is true?​
guajiro [1.7K]

D

Step-by-step explanation:

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Round 4,752 all the way
Flura [38]
Nearest 10: 4750 
<span>Nearest 100: 4800 </span>
<span>Nearest 1000: 5000 </span>
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The dotted line represents the mid segment of the trapezoid. Find the value of X
Ganezh [65]

<u>Given</u>:

Given that the bases of the trapezoid are 21 and 27.

The midsegment of the trapezoid is 5x - 1.

We need to determine the value of x.

<u>Value of x:</u>

The value of x can be determined using the trapezoid midsegment theorem.

Applying the theorem, we have;

Midsegment = \frac{b_1+b_2}{2}

where b₁ and b₂ are the bases of the trapezoid.

Substituting Midsegment = 5x - 1, b₁ = 21 and b₂ = 27, we get;

5x-1=\frac{21+27}{2}

Multiplying both sides of the equation by 2, we have;

2(5x-1)=(21+27)

Simplifying, we have;

10x-2=48

Adding both sides of the equation by 2, we get;

10x=50

Dividing both sides of the equation by 10, we have;

x=5

Thus, the value of x is 5.

6 0
3 years ago
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