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3 years ago

Please help I need this done ASAP 10 points + crown for whoever has the most accurate answer

Mathematics

1 answer:

koban [17]3 years ago

4 0

Part a)

Time:distance

1:3

Part b)

6 hours

Part C)

81km

Answered by Gauthmath must click thanks and mark brainliest

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Please anybody help me please this is so hard that not even I can't solve this I don't pay attention in class

Alla [95]

Answer:

$m\angle B=54^{\circ}$

$m\angle BAD=36^{\circ}$

$m\angle CDA=90^{\circ}$

$BAC=72^{\circ}$

Step-by-step explanation:

Given:

$\overline{AB}\cong \overline{AC},$

$\overline{AD}$ bisects angle BAC

$m\angle C=54^{\circ}$

Triangle ABC is isosceles triangle, because $\overline{AB}\cong \overline{AC}.$ Angles adjacent to the base of isosceles triangle ABC are congruent.

Hence,

$m\angle C=m\angle B=54^{\circ}$

The sum of the measures of all interior angles is 180°, so,

$m\angle B+m\angle C+m\angle BAC=180^{\circ}\\ \\m\angle BAC=180^{\circ}-2\cdot 54^{\circ}=72^{\circ}$

Since $\overline{AD}$ bisects angle BAC, angles BAD and CAD are congruent by definition of angle bisector. So,

$m\angle BAD=m\angle CAD=\dfrac{1}{2}m\angle BAC=\dfrac{1}{2}\cdot 72^{\circ}=36^{\circ}$

AD ia angle bisector in isosceles triangle drawn to the base, so it is the height. Thus, AD and BC are perpendicular. So,

$m\angle CDA=90^{\circ}$

8 0

3 years ago

Suppose that the function LaTeX: f(x) f ( x ) is shifted horizontally to the right by LaTeX: a a , reflected across the LaTeX: x

Sveta_85 [38]

Answer:

$g(x) = (x-a,-y - b)$

Step-by-step explanation:

Given

Represent f(x) as follows:

$f(x) = (x,y)$

Transformations:

Horizontally shifted right by a

Reflected across x axis

Vertically shifted down by b

Taking the transformations one after the other.

Horizontally shifted right by a

When a function is shifted right, the resulting function is:

$f' = (x-a,y)$

Reflected across x axis

Here, the x axis remains unaltered while the y axis is negated

$f' = (x-a,y)$

becomes

$f" = (x-a,-y)$

Vertically shifted down by b

When a function is shifted down by b, the resulting function is:

$f"' = f" - b$

i.e, subtract b from the function (f(x) or y, as the case may be)

So, we have:

$f"' = (x-a,-y - b)$

Represent f"' with g(x)

$g(x) = (x-a,-y - b)$

3 0

3 years ago

There are 15 boys and 45 girls competing in a race. What is the ratio of girls to boys in the race , lowest terms ?

Ivanshal [37]

<h3>Answer = 3:1</h3>

==========================================

Work Shown

45 girls : 15 boys

45/15 girls : 15/15 boys .... divide both parts by 15

3 girls : 1 boy

This tells us there are three times as many girls as there are boys.

We write this as the ratio 3 : 1. The order of the terms is important. We cannot say 1:3 since that would imply there are more boys than girls, but it's the other way around.

7 0

3 years ago

The Medicare tax rate is 1.45% how much would be withheld form someone paycheck for Medicare with wages of $1,738 for that pay p

Tcecarenko [31]

Answer: $\$25.201$

Step-by-step explanation:

Given

The Medicare tax rate is 1.45%

The wages of a person is $1738

The amount which is withheld from the person paycheck is

$\Rightarrow 1738\times 1.45\%\\\Rightarrow 1738\times 0.0145\\\Rightarrow \$25.201$

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3 years ago

I need to find the volume of a sphere

Feliz [49]

Answer:

523.6

Step-by-step explanation:

Following the calculation, and 3.14 for pi, the answer would be 523.6

8 0

3 years ago