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3 years ago

60. Brett walks at a speed of 4 miles per hour. He walks for 20 minutes in a straight line

Mathematics

1 answer:

larisa [96]3 years ago

6 0

Answer: G) 1.3miles

Step-by-step explanation:

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Through which pairs of points is the slope negative? Select all that apply.

horsena [70]

Answer:

The answer is C and D

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3 years ago

The law of cosines is used to find the measure of Z.

Shtirlitz [24]

Answer:

C. $Z=51^{\circ}$

Step-by-step explanation:

We have been given a triangle. We are asked to find the measure of angle Z using Law of cosines.

Law of cosines: $c^2=a^2+b^2-2ab\cdot \text{cos}(C)$ , where, a, b and c are sides opposite to angles A, B and C respectively.

Upon substituting our given values in law of cosines, we will get:

$16^2=19^2+18^2-2(19)(18)\cdot \text{cos}(Z)$

$256=361+324-684\cdot \text{cos}(Z)$

$256=685-684\cdot \text{cos}(Z)$

$256-685=685-685-684\cdot \text{cos}(Z)$

$-429=-684\cdot \text{cos}(Z)$

$\frac{-429}{-684}=\frac{-684\cdot \text{cos}(Z)}{-684}$

$0.627192982456=\text{cos}(Z)$

$\text{cos}(Z)=0.627192982456$

Now, we will use inverse cosine or arc-cos to solve for angle Z as:

$Z=\text{cos}^{-1}(0.627192982456)$

$Z=51.1566718^{\circ}$

$Z\approx 51^{\circ}$

Therefore, the measure of angle Z is approximately 51 degrees.

6 0

3 years ago

Read 2 more answers

An elevator is two floors below ground level and goes up 5 floors. Write an addition equation that models the location of the el

makkiz [27]

Answer: d= +5-2 = 3

Step-by-step explanation:

An elevator is two floor below the ground level. Any distance below the ground level is always measured with the negative notation.

So the location of the elevator given by (-2)

Now when elevator goes up by 5 floors, the location of elevator relative to the ground level will be (+5)

d=+5-2

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3 years ago

NECESITO AYUDA URGENTE...

Alborosie

Answer:

Step-by-step explanation:

1- Order in descending order the following polynomial with respect to the

variable n. Then identify the independent term:

$6n^3 + 7n^4 - 2n^2 - 5 + 9n^5$

The independent term is - 5.

3- Look at the following polynomial and identify what the terms are

similar:

$- 8 + 3m^3 n - 4m^2n + 7mn^2 - 11nm^3 + 6 m^2 n$

The similar terms are + 3m^3 n and - 11 nm^3 and

- 4 m^2 n and 6 m^2 n

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3 years ago

If four students are selected at random, find the probability that all four rate their study habits as very good

maxonik [38]

Would depend on how many other students are in the class/school.

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3 years ago