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Ad libitum [116K]
3 years ago
5

Find the value of the unknown angle. 25 30 43 80

Mathematics
1 answer:
KengaRu [80]3 years ago
5 0

Answer:

It is 30°

Step-by-step explanation:

Putting the formula exterior angle of a triangle = the sum of 2 interior angles of a triangle.

let the angle be x;

Therefore,

80°+x = 110°

x = ( 110 - 80 )°

x = 30°

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Simplify the expression 111,000*0.072 using scientific notation and express your answer in scientific notation.
Gemiola [76]

Answer:

7.992 × 10 ^3

Step-by-step explanation:

I hope this helps.

3 0
2 years ago
Find the number if:
Paraphin [41]

Answer:

162 and \frac{5}{2}

Step-by-step explanation:

To find the original number multiply by the reciprocal of the multiplier, that is

90 × \frac{9}{5} = \frac{810}{5} = 162

------------------------------------------------------------------------

Similarly

Change the mixed number into an improper fraction

5 \frac{5}{6} = \frac{35}{6} , then

\frac{35}{6} × \frac{3}{7} ( cancel 35 and 7 by 7 / cancel 6 and 3 by 3 )

= \frac{5}{2} × \frac{1}{1}

= \frac{5}{2}

7 0
2 years ago
Read 2 more answers
The diagonal of a TV set is 13 inches long. It’s length is 7 inches more than the height. Find the dimensions of the TV set.
alukav5142 [94]

Answer: The length is 12 inches while the height is 5 inches

Step-by-step explanation: It the Television has a diagonal of 13 inches, and a height of H inches, then the length would be (H + 7) inches. It’s length is 7 inches more than the height. At this point we can draw up a right angled triangle with the hypotenuse as 13 (diagonal side) and the other two sides as H and (H + 7)

Then we can apply the Pythagoras theorem which states that

AC^2 = AB^2 + BC^2

(Where AC is the hypotenuse and AB and BC are the two other sides)

Hence,

13^2 = H^2 + (H + 7)^2

169 = H^2 + (H^2 + 14H + 49)

169 = 2H^2 + 14H + 49

By collecting like terms we now have

169 - 49 = 2H^2 + 14H

120 = 2H^2 + 14H

By re-arranging all terms on one side of the equation, we arrive at

2H^2 + 14H - 120 = 0

Divide all sides by 2

H^2 + 7H - 60 = 0

To solve the quadratic equation, we now factorize and we have,

H^2 + 12H - 5H - 60 = 0

(H + 12) (H - 5) = 0

Therefore

Either H + 12 = 0 OR

H - 5 = 0

Hence, Either H = -12 or H = 5

The dimension can not be a negative value so we shall take h equals 5.

Having calculated the height of the television as 5 inches, the length which was given as H + 7 can now be calculated as

Length = H + 7

Length = 5 + 7

Length = 12

Therefore, the length of the Television is 12 inches and the height is 5 inches

4 0
3 years ago
Find the equation in standard form of the line with slope
Serhud [2]
\bf \begin{array}{lllll}
&x_1&y_1\\
%   (a,b)
&({{ 5}}\quad ,&{{ 7}})
\end{array}
\\\\\\
% slope  = m
slope = {{ m}}= \cfrac{rise}{run} \implies \cfrac{7}{2}
\\\\\\
% point-slope intercept
\stackrel{\textit{point-slope form}}{y-{{ y_1}}={{ m}}(x-{{ x_1}})}\implies y-7=\cfrac{7}{2}(x-5)\implies y-7=\cfrac{7}{2}x-\cfrac{35}{2}
\\\\\\
y=\cfrac{7}{2}x-\cfrac{35}{2}+7\implies \stackrel{standard~form}{-\cfrac{7}{2}x+y=-\cfrac{21}{2}}
3 0
3 years ago
16 - x = -2 solve for x
poizon [28]

Answer:

16 - x = -2

16 + 2 = x

x = 18

hope it helps!

4 0
2 years ago
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