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irinina [24]
2 years ago
11

A number is doubled and then increased by seven. The result is seventy-one. What is the original number?

Mathematics
1 answer:
marissa [1.9K]2 years ago
6 0

Answer:

i think its 43

Step-by-step explanation:

2 x X + 7 = 93

substract 7 from both sides then divide both sides by 2

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Find the size of angle XYZ.<br>Give your answer to 1 decimal place.<br>Z<br>13 cm<br>x<br>Y<br>4 cm​
Rzqust [24]

Answer:

<h2><em>7</em><em>2</em><em>.</em><em>9</em><em>°</em></h2>

<em>sol</em><em>ution</em><em>,</em>

<em>tan \: y \:  =  \frac{13}{4}  \\ y =  {tan}^{ - 1}  ( \frac{13}{4} ) \\ y = 72.9</em>

<em>hope</em><em> </em><em>this</em><em> </em><em>helps</em><em> </em><em>.</em><em>.</em><em>.</em><em>.</em>

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7 0
3 years ago
Read 2 more answers
Given the polynomial 2x3 + 18x2 − 18x − 162, what is the value of the coefficient 'k' in the factored form?2x3 + 18x2 − 18x − 16
s344n2d4d5 [400]

Answer:

k=3

Step-by-step explanation:

Let

f(x)=2x^3+18x^2-18x-162

We factor 2 to obtain;

f(x)=2(x^3+9x^2-9x-81)

We factor the polynomial within the parenthesis by grouping.

f(x)=2(x^2(x+9)-9(x+9)

f(x)=2(x^2-9)(x+9)

f(x)=2(x^2-3^2)(x+9)

We apply difference of two squares on the second factor: x^2-3^2=(x-3)(x+3)

f(x)=2(x+3)(x-3)(x+9)

We now compare to;

f(x)=2(x+k)(x-k)(x+9)

It is now obvious that k=3

6 0
3 years ago
What is the equivalent to 2:3 ?
leva [86]

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If you have any further questions feel free to ask.

Hope this helps.

8 0
3 years ago
Which of the following is equivalent to 180 centimeters?
den301095 [7]
The answer is 1.8 meters
4 0
3 years ago
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I need help writing the first 5 terms of the sequence!
Angelina_Jolie [31]

The first five terms of the sequence are 1, 4, 7, 10, 13.

Solution:

Given data:

a_{1}=1

a_{n}=a_{n-1}+3

General term of the arithmetic sequence.

a_{n}=a_{n-1}+d, where d is the common difference.

d = 3

a_{n}=a_{n-1}+3

Put n = 2 in a_{n}=a_{n-1}+3, we get

a_{2}=a_1+3

a_{2}=1+3

a_2=4

Put n = 3 in a_{n}=a_{n-1}+3, we get

a_{3}=a_2+3

a_{3}=4+3

a_3=7

Put n = 4 in a_{n}=a_{n-1}+3, we get

a_{4}=a_3+3

a_{4}=7+3

a_4=10

Put n = 5 in a_{n}=a_{n-1}+3, we get

a_{5}=a_4+3

a_{5}=10+3

a_5=13

The first five terms of the sequence are 1, 4, 7, 10, 13.

3 0
3 years ago
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