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devlian [24]
4 years ago
14

2. What is the value of x? Show your work.

Mathematics
2 answers:
kirza4 [7]4 years ago
8 0

Answer:

x=7

Step-by-step explanation:

We are given that

\angle K=\angle N

\angle J=\angle M

Therefore, \triangle JKL\sim \triangle MNP

By AA similarity postulate

AA similarity: When two angles of one triangle are equal to its corresponding angles of other triangle then , two triangles are similar by AA similarity.

When two triangles are similar then the ratio of their corresponding sides are equal.

Therefore, \frac{JK}{MN}=\frac{JL}{MP}

We have JK=25 units,MN=30 units

JL=20 units,MP=4x-4

Substitute the values then we get

\frac{25}{30}=\frac{20}{4x-4}

\frac{5}{6}=\frac{20}{4(x-1)}=\frac{5}{x-1}

x-1=\frac{5\times 6}{5}

x-1=6

x=6+1=7

Hence, the value of x=7

trapecia [35]4 years ago
4 0
The answer will be 7.....value of x is 7 i believe

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Problem is attached, need to use sin and cosine formulas
Tatiana [17]

In triangle 1, the values are α = 65°, a = 42.02, and 45.66. And in triangle 2, the values are β = 55.74, γ = 84.26, and c = 10.84.

<h3>What is the law of sines?</h3>

For any triangle ABC, with side measures |BC| = a. |AC| = b. |AB| = c,

we have, by law of sines,

\dfrac{\sin \alpha }{a} = \dfrac{\sin \beta }{b} = \dfrac{\sin \gamma}{c}

1.  β = 15°, γ = 100°, and b = 12, then the missing side and angle will be

The sum is 180° of a triangle. Then the value of α will be 65°.

\dfrac{\sin 65^o}{a} = \dfrac{\sin 15^o}{12} = \dfrac{\sin 100^o}{c}

Then the value of a will be

a = 42.02

Then the value of c will be

c = 45.66

2.  α = 40°, a = 7, and b = 9, then the missing side and angle will be

(sin 40°)/7 = (sin β) / 9

       sin β = 0.82644

             β = 55.74

The sum is 180° of a triangle. Then the value of γ will be 84.26°.

Then the value of c will be

c = 10.84

Learn more about the law of sines here:

brainly.com/question/17289163

#SPJ1

7 0
2 years ago
How do i solve this?
Ksenya-84 [330]

Answer:

Win:Draw

6:1

Step-by-step explanation:

6 wins gets 6 points. 1 draw gets 0.5 points. 6+0.5=6.5

6 0
4 years ago
Cos 15 - sin 15 = 1/2 <br><br><br>prove that :​
yuradex [85]

Answer:

Cos(15) = Cos(45-30)

Sin(15) = Sin(45-30)

Cos(45-30) - Sin(45-30)

Simplifying both brackets

Recall

Cos(A+B) = CosACosB - SinASinB (For cosine... The sign is always the opposite during expansion. If you look... Cos(A+B) became negative during its expansion;So if It was Cos(A–B)... Its expansion is CosACosB + SinASinB)]

Sin(A+B) = SinACosB + CosASinB

Now let's go!

Cos(45-30) = Cos45Cos30 + Sin45Sin30

From Trig

Cos45 = 1/√2

Cos30 = √3/2

Sin45 = 1/√2

Sin30 = 1/2

Substituting

Cos(45-30) = (1/√2).(√3/2) + (1/√2).(1/2)

= √3/(2√2) + 1/(2√2)

= 1 + √3/(2√2).

For

Sin(45 - 30)

= Sin45cos30 – Cos45Sin30

= (1/√2).(√3/2) – (1/√2).(1/2)

= √3/(2√2) – 1/2√2

= √3 – 1/(2√2)

So the question was

Cos15 - Sin15

Substituting...

1 + √3 / 2√2 – (√3 - 1)/ 2√2

When the Minus interacts with the parenthesis

We have

1 + √3 - √3 + 1 / (2√2)

= 2/2√2

= 1/√2.

THE ANSWER IS 1/√2 AND NOT 1/2.

YOU CAN VERIFY THIS WITH YOUR CALCULATOR ALSO.

YOU'LL HAVE 0.7071 WHICH IS SAME AS 1/√2.

HAVE A GREAT DAY!

5 0
3 years ago
There are 6 rows of 16 chairs. In the first 4 rows 2 chairs on each end are reserved. The rest of the chairs are for students. H
sasho [114]
4 × 2 = 6 2×6=11×16=176
7 0
3 years ago
Read 2 more answers
In the economy of talikastan in 2015, consumption was $3000, exports were $1200, gdp was $8000, government purchases were $1200,
kolbaska11 [484]
Investment = $5600

GDP = consumption+investment+export-imports- government expense
investment = GDP-consumption-export+import+expense
investment = $8000-$3000-$1200+$600+$1200
investment = $5600
The investment of the talikastan in 2015 is $5600
8 0
4 years ago
Read 2 more answers
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