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aleksklad [387]
4 years ago
15

Can someone please help me with ALL of these questions

Mathematics
1 answer:
lora16 [44]4 years ago
5 0
37. B: Negative inverse, the product of the gradients is -1

38. C: decreases

39. B: the sum of all divided by 9
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In ΔHIJ, the measure of ∠J=90°, the measure of ∠H=71°, and JH = 2 feet. Find the length of IJ to the nearest tenth of a foot.
denis-greek [22]

Answer:

IJ = 5.81 ft

To the nearest tenth = 10 ft

Step-by-step explanation:

ΔHIJ is a right angle triangle.

∠J=90°

∠H=71°

JH = 2

IJ = ?

∠I = 180 - (∠J+∠H)

∠l = 180-(90+71)

∠l = 180 - 161

∠l = 19°

Tan ∠l =.JH / IJ

Tan 19 = 2/IJ

0.3443 * IJ = 2

IJ = 2/0.3443

IJ = 5.81 ft

To the nearest tenth = 10 ft

5 0
3 years ago
Read 2 more answers
If JL = 16, KM = 4x-1, and KM is a perpendicular bisector of JL, determine which of the following values are correct. Select ALL
ddd [48]

*see attachment for diagram

Answer:

C.KM = 15

D.KL = 17

F.Perimeter or triangle JKL = 50

Step-by-step explanation:

Given:

JL = 16,

KM = 4x-1

JK = 6x - 7

KL = 5x - 3

✔️Thus, let's find the value of x

Since KM is a perpendicular bisector of JL, it means JM = LM = ½*16 = 8

KM in ∆KJM is equal to KM in ∆KLM.

The angles opposite the two corresponding congruent sides in both triangles are also congruent to each other. Therefore, the third corresponding side and angles would be congruent to each other.

Thus:

JK = KL

6x - 7 = 5x - 3 (substitution)

Collect like terms

6x - 5x = 7 - 3

x = 4

✔️Find JK:

JK = 6x - 7

Plug in the value of x

JK = 6(4) - 7

JK = 24 - 7

JK = 17

✔️Find KM:

KM = 4x - 1

Plug in the value of x

KM = 4(4) - 1

KM = 16 - 1

KM = 15

✔️Find KL:

KL = 5x - 3

Plug in the value of x

KL = 5(4) - 3

KL = 20 - 3

KL = 17

✔️Find the Perimeter of ∆KLM:

Perimeter of ∆KLM = KM + KL + LM

= 15 + 17 + 8

= 40

✔️Find the Perimeter of JKL:

Perimeter of ∆JKL = JK + KL + JL

= 17 + 17 + 16

= 50.

The correct values are:

C.KM = 15

D.KL = 17

F.Perimeter or triangle JKL = 50

6 0
3 years ago
Find mDCAˆ. the question says that the angle is 3x+19 the smaller arc is 91 and the bigger is 17x-3 it is one of those problems
valina [46]

Answer: Option C.

Step-by-step explanation:

Let as consider the below figure is attached below.

We know that angle between tangent and secant is half of difference of major and minor arcs.

\angle ABC=\dfrac{arc(AD)-arc(AC)}{2}

3x+19=\dfrac{17x-3-91}{2}

Multiply both sides by 2.

6x+38=17x-94

38+94=17x-6x

132=11x

Divide both sides by 11.

12=x

The value of x is 12.

arc(AD)=17(12)-3

arc(AD)=204-3

arc(AD)=201^{\circ}

Now,

arc(DCA)=360^\circ-arc(AD)

arc(DCA)=360^\circ-201^{\circ}

m\widehat {DCA}=159^{\circ}

Therefore, the correct option is C .

5 0
3 years ago
I need help plz no one in my class understands it?
grandymaker [24]
Because none of those are the right answer. you are given units in feet in the diagram. but are told 6 inches are lost in 4 hours. so you multiply length width and height keeping the feet then subtract .5 ft. the equation should look like V=(12×7×8)-.5
7 0
3 years ago
What is the domain of y=log 4(x+3)?
Maslowich
All the real number less than -3. It the first one hope this help
4 0
3 years ago
Read 2 more answers
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