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bagirrra123 [75]
2 years ago
6

How to solve for x and what does x equal in this?​

Mathematics
2 answers:
Tanya [424]2 years ago
7 0

Answer:

10

Step-by-step explanation:

give brainliest please!

hope this helps :)

so these two angles add up to 180 degrees

7x -3 + 12x -7 = 180

7x+12x=180+7+3

19x=190

x=10

to check if this is true we can input 10 for x in each side.

7(10)-3 = 67

12(10)-7 = 113

113+67 = 180

Vladimir79 [104]2 years ago
3 0
The answer is A, or 10.

Explanation:

These two angles are supplementary, meaning that they add up to 180 degrees. Upon plugging 10 in as x, you would get 67 as the answer for the left angle measurement and 113 as the answer for the right angle measurement. Because 67 + 113 = 180, you know that the math you did is correct. Linear pair angles always are supplementary, and they are directly beside each other horizontally or vertically.
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laptop screen sizes are determines by the diagonal measurement rounded to the nearest whole number a laptop screen has a 9 in wi
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Formula
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a² + b² = c²

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Find Diagonal
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9² + 7² = c²
c² = 81 + 49
c² = 130
c = 11 in (Nearest whole number)

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Answer: The diagonal measure 11 inches
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6 0
3 years ago
Explain why 2n+1 must be an odd number
Lorico [155]
If is an integer (a whole number), then the expression represents an even number, because even numbers are the multiples of 2. The expressions 2 n − 1 and 2 n + 1 can represent odd numbers, as an odd number is one less, or one more than an even number.
4 0
3 years ago
I need help with this.
I am Lyosha [343]

Answer:

9x2 and 9x2

Step-by-step explanation:

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3 years ago
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valentina_108 [34]

Answer:

102.62

Step-by-step explanation:

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4 0
2 years ago
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A person on the ground looks up at an angle of 28° and sees the top of a tree and the top of a building aligned. The tree is 20
lorasvet [3.4K]

Answer:

21.27 meters.

Step-by-step explanation:

Please find the attachment.

Let H and h represent height of building and tree respectively.

We have been given that a person on the ground looks up at an angle of 28° and sees the top of a tree and the top of a building aligned. The tree is 20 m away from the person and the building is 60 m away from the person.

We know that tangent relates opposite side of a right triangle with its adjacent side.

\text{tan}=\frac{\text{Opposite}}{\text{Adjacent}}

\text{tan}(28^{\circ})=\frac{H}{60}

60\cdot \text{tan}(28^{\circ})=H

60\cdot 0.531709431661=H

H=31.90256589966\approx 31.90

Similarly, we can find height of the tree.

\text{tan}(28^{\circ})=\frac{h}{20}

20\cdot\text{tan}(28^{\circ})=h

20\cdot 0.531709431661=h

h=10.63418863322\approx 10.63

H-h=31.90-10.63

H-h=21.27

Therefore, the difference in heights between the building and tree is 21.27 meters.

3 0
2 years ago
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