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2 years ago

plz explain why! Will be marked BRAINLIEST

Mathematics

2 answers:

sdas [7]2 years ago

7 0

Eva is Correct (Unnecessary Stuff)

wlad13 [49]2 years ago

6 0

ANSWER

Eva is correct because 13/2 + 3/2 = 8

There is no mistake. Dakota may have thought that there was a mistake because Eva simplified when she got the answer for 4x which is correct but Dakota may have thought that it was incorrect.

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What is the value of x, rounded to the nearest degree? x ≈ ° According to the manufacturer, if the angle the ladder forms with t

DerKrebs [107]

The measure of the value of x is 70.52 degrees.

Given

A 12-foot ladder is placed 4 feet away from a house as shown.

According to the manufacturer, if the angle the ladder forms with the ground, x, is between 70° and 75°, then it meets safety standards.

<h3>What is cos angle?</h3>

The cos theta is defined as the ratio of the side adjacent to the angle and the hypotenuse.

The following formula is used to calculate the value of x;

$\rm Cosx=\dfrac{Side \ adjacent \ to \ angle}{Hypotenuse}\\$

Where the side adjacent to angle = 4 and hypotenuse is 12.

Substitute all the values in the formula;

$\rm Cosx=\dfrac{Side \ adjacent \ to \ angle}{Hypotenuse}\\\\\rm Cosx=\dfrac{4}{12}\\\\\rm Cosx=\dfrac{1}{3}\\\\x=Cos{-1}(\dfrac{1}{3}\\\\x= 70.52 \ degrees\\\\$

Hence, the measure of the value of x is 70.52 degrees.

To know more about Trigonometric ratios click the link given below.

brainly.com/question/3630461

5 0

2 years ago

A rectangle has an area of 240 square meters and a width of 15 meters.

Nuetrik [128]

It would be 16 meters long

6 0

2 years ago

The equation y - 3x - 5 = 0 when written in slope-intercept form is:

quester [9]

Answer:

y = 3x + 5

Step-by-step explanation:

The zero seems to be a place holder to mess you up. Just ignore that it doesn't do anything. Add -3x and -5 to the both sides to create y = 3x + 5

5 0

1 year ago

A motorboat maintained a constant speed of 12 miles per hour relative to the water in going 45 miles upstream and then returning

Serggg [28]

Answer: Speed of the current is 3 miles per hour.

Step-by-step explanation:

Since we have given that

Speed of motor boat = 12 miles per hour

Distance traveled upstream = 45 miles

Let the speed of the current be x

Total time taken by upstream and downstream = 8 hours

Relative speed for downstream is given by

$12+x$

Relative speed for upstream is given by

$12-x$

According to question, we have

$\frac{45}{12+x}+\frac{45}{12-x}=8\\\\\frac{45(12-x)+45(12+x)}{(12-x)(12+x)}=8\\\\\frac{45(12-x+12+x)}{144-x^2}=8\\\\\frac{24}{144-x^2}=\frac{8}{45}\\\\45\times 24=8(144-x^2)\\\\45\times 3=144-x^2\\\\135=144-x^2\\\\135-144=-x^2\\\\-9=-x^2\\\\x=\sqrt{9}=\pm3\\\\\text{But x=-3 will be igonored as speed cant be in negative}\\\\x=3\ mile\ per\ hour$

Hence, Speed of the current is 3 miles per hour.

7 0

2 years ago

23.

olganol [36]

72 boys.

Step-by-step explanation:

no. of boys (initial) : no. of girls : no. of boys (final)

3 : 2

______________________________________

9 : 6 : 4

9u - 4u = 5u = 30

5u = 30

1u = 30/5 = 8

9u (initial no. of boys) = 8×9

= 72

6 0

1 year ago

￼plz explain why! Will be marked BRAINLIEST

plz explain why! Will be marked BRAINLIEST