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3 years ago

PLEASE HELP ME WITH THIS QUESTION AND SHOW YOUR STEPS PLEASE HELP ME NOW

Mathematics

2 answers:

Otrada [13]3 years ago

8 0

Answer:

θ = 68°

Step-by-step explanation:

The side 3 is adjacent to the angle we need to find , and we know the hypothenuse so will use the cosθ function

cos θ = adj/ hyp = 3/8

To find the angle we need to apply the inverse function cos ^(-1) and use the calculator to solve it.

θ = cos ^(-1) (3/8) = 67.97

Round to the nearest degree and will have

θ = 68°

Harrizon [31]3 years ago

5 0

Answer:

68°

Step-by-step explanation:

The situation can be represented by a right triangle with the ladder as the hypotenuse and θ as the angle between the ladder and the ground.

Using the cosine ratio in the right triangle

cosθ = $\frac{adjacent}{hypotenuse}$ = $\frac{3}{8}$ , then

θ = $cos^{-1}$ ( $\frac{3}{8}$ ) ≈ 68° ( to the nearest degree )

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alexdok [17]

Answer:

Step-by-step explanation:

$||3-7| - |-6+3||$

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6 0

3 years ago

The table shows the temperature of an amount of water set on a stove to boil, recorded every half minute. a 2-row table with 10

olga nikolaevna [1]

According to the line of best fit, the value of time when the temperature reach 100°c, the boiling point of water is 5.

<h3>What is linear regression?</h3>

Linear regression is a type of regression which is used to model the statement in which the growth or decay initially with constant rate, and then slow down with respect to time.

The table shows the temperature of an amount of water set on a stove to boil, recorded every half minute. a 2-row table with 10 columns.

Time (minutes X) 0, 0.5,1.0, 1.5, 2.0,2.5,3.0, 3.5, 4, 4.5.
Temperature (° Celsius Y) 75, 79, 83, 86, 89, 91, 93, 94, 95, 95.5.

The sum of time is 22.5 and the sum of temperature value is 880.5. In this table,

The mean of time value, 2.25.
The mean of temperature value 88.05
Sum of squares 20.625
Sum of products 93.625

The regression equation for this data can be given as,

$\hat y=4.53939 X+77.83636$

Put the value of temperature (y) 100 in this equation.

$100=4.53939 X+77.83636\\X=\dfrac{100-77.83636}{4.53939}\\X\approx 5$

Hence, according to the line of best fit, the value of time when the temperature reach 100°c, the boiling point of water is 5.

Learn more about the regression here;

brainly.com/question/25226042

4 0

2 years ago

Pleaseeeeee help !!

umka21 [38]

$A.\\-vp+40 < 95\qquad\text{subtract 40 from both sides}\\\\-vp < 55\qquad\text{change the signs}\\\\vp > -55\qquad\text{divide both sides by p}\\\\If\ p > 0\ then\ v>-\dfrac{55}{p}.\\\\If\ p < 0\ then\ v < -\dfrac{55}{p}$

$B>\\8w-3r=45\qquad\text{subtract 8 from both sides}\\\\-3r=-8w+45\qquad\text{change the signs}\\\\3r=8w-45\qquad\text{divie both sides by 3}\\\\r=\dfrac{8w-45}{3}$

4 0

3 years ago

Does anyone know What does x equal?

vazorg [7]

The answer is x = 17

2x - 14 = 37 - x
+14 +14

2x = 51 - x
+x +x

3x = 51/3

X = 17

7 0

3 years ago

Two planes start flying towards each other simultaneously from two different cities. The distance between the cities is 960 mile

ANTONII [103]

Answer:

257.5 mph

332.5 mph

Step-by-step explanation:

The initial distance between the two planes is 960 miles, while the final distance (after t=1.5 h) is 75 miles, so the total distance covered by the two planes in 1.5h is

$d=960-75=885$ miles

Calling v1 and v2 the velocities of the two planes, we have the following equations:

(1) $v_1 = v_2 + 75$ --> velocity of plane 1 exceeds velocity of plane 2 by 75 mph

(2) $v_1 t+ v_2 t=885$ --> the total distance covered by the two planes is 885 miles (t=1.5 h is the time, and the products v1 t and v2 t represent the distance covered by each plane)