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Crazy boy [7]
3 years ago
13

Without using paper and pencil, how would you find the sum of 23 and 37?

Mathematics
2 answers:
ankoles [38]3 years ago
8 0
You could use a calculator, or do mental math.  
exis [7]3 years ago
4 0
You could also use your fingers, but that would take a while.
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In the figure CD is the perpendicular bisector of AB . If the length of AC is 2x and the length of BC is 3x - 5 . The value of x
Dennis_Churaev [7]

Answer

Find out the value of x .

To proof

SAS congurence property

In this property two sides and one angle of the two triangles are equal.

in the Δ ADC and ΔBDC

(1) CD = CD (common side of both the triangle)

(2) ∠CDA = ∠ CDB = 90 °

( ∠CDA +∠ CDB = 180 ° (Linear pair)

as given in the diagram

∠CDA  = 90°

∠ CDB = 180 ° - 90°

∠ CDB = 90°)

(3) AD = DB (as shown in the diagram)

Δ ADC ≅ ΔBDC

by using the SAS congurence property .

AC = BC

(Corresponding sides of the congurent triangle)

As given

the length of AC is 2x and the length of BC is 3x - 5 .

2x = 3x - 5

3x -2x =5

x = 5

The value of x is 5 .

Hence proved


7 0
3 years ago
Read 2 more answers
Not sure how to solve this one
Alex73 [517]

Answer:

x\approx 63.4^0

Step-by-step explanation:

In the given right triangle,

Measure of angle = x°

Opposite side of the angle = 12 units

Adjacent side of the angle = 6 units

By taking tangent ratio of the given angle,

tan(x°) = \frac{\text{Opposite side}}{\text{Adjacent side}}

           = \frac{12}{6}

           = 2

x^0=\text{tan}^{-1}(2)}

x=63.43^0

x\approx 63.4^0

4 0
2 years ago
A triangle's area is given by the expression 3x2-x+12. The height is 6x. The base off the triangle is the quotient of the area a
patriot [66]
You have known the formula Length of base is la division of Area and a haft of the height.
So we have 3
(3 {x}^{2}  - x + 12) \div ( \frac{1}{2}  \times 6x)
or
(3 {x}^{2}  - x + 12) \div 3x
3 {x}^{2}  \div 3x +(  - x \div 3x) + 12 \div 3x
and
x -  \frac{1}{3}  +  \frac{4}{x}
have fun
6 0
2 years ago
What is the value of the x variable in the solution to the following system of equations?
iren [92.7K]
The correct answer should be c) 3.
6 0
3 years ago
20 POINTS!!!
Inga [223]

Step-by-step explanation:

I think option A is the correct answer

Because it is in ascending order

4 0
3 years ago
Read 2 more answers
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