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Elan Coil [88]
3 years ago
6

For the △ACD is shown below, select all the true statements. Lengths are rounded to the nearest tenth.

Mathematics
1 answer:
Nina [5.8K]3 years ago
3 0

Answer:

1. No

2. No

3. Yes

4. Yes

Step-by-step explanation:

The diagram has been attached

The total angle in a triangle is 180°

<CAD=45°

<ACD=90°

Therefore <ADB=45°

1. ∠ADB = 30° no

ADC = 90 - 45 = 45

∠BDC = 90 - 65 = 25

∠ADB = 45 - 25 = 20

2.△ABD ∼ △ACD no going

by law of sines

3.CD = 33.7 centimeters => yes

4.BD = 37.2 centimeters => yes

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(10y-37)=(4y+7) what is the answer?
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Answer:

Step-by-step explanation:

10y-37 = 4y+7

by transposing,

10y-4y = 7+37

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7 0
3 years ago
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At midnight, the temperature was 30 degrees Fahrenheit. By 6:00 am, IT had dropped 5 degrees Fahrenheit and by noon, it had incr
Allisa [31]
At noon, the temperature was 36 degrees. At midnight, the temperature was 30 degrees. By 6:00 am it drooped 5 degrees. Since it dropped 5 degrees, you subtract 5 from 30, which equals 25. It then increased by 11 degrees. Since the temperature increased, you add 11 to 25, which equals 36. At noon, the temperature was 36 degrees.
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3 years ago
Suppose m is directly proportional to the cube of x and that when x=2 m=4
AlladinOne [14]

Answer:

A.)x=3 m=6

Step-by-step explanation:

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7 0
2 years ago
Solve using Substitution y = 6x - 11 -2x - 3y = -7
vladimir2022 [97]

Answer:

(2, 1)

Step-by-step explanation:

To solve by substitution, we solve one equation for one of its variables and then substitute the solved value for that variable into the other equation. Because this system of equations already has one solved for the variable, this makes our job much easier. We only need to implement the solved value for y into the other equation and solve for x.

y = 6x - 11

-2x - 3(6x - 11) = -7 Distribute.

-2x - 18x + 33 = -7 Combine like terms.

-20x + 33 = -7 Subtract 33 from both sides of the equation.

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x = 2

Then, with this value, we will place it into the equation that was already solved for y in order to get a definite value for y.

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y = 12 - 11

y = 1

Using this information, the coordinate pair for this equation (the point of intersection between the two lines) is (2, 1).

4 0
3 years ago
Which is bigger 80% of 90 or half of 140
Dmitry_Shevchenko [17]
80% of 90 is 72 and half of 140 equals 70. So 80% of 90 is bigger
4 0
3 years ago
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