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3 years ago

Identify a pair of vertical angles in the figure.

Mathematics

1 answer:

Mnenie [13.5K]3 years ago

4 0

The answer is A Idk now if that can help

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In a trapezoid with bases of lengths a and b, a line parallel to the bases is drawn through the intersection point of the diagon

Helga [31]

Answer:

$\dfrac{2ab}{a+b}.$

Step-by-step explanation:

Consider the trapezoid ABCD. In this trapezoid BC=a and AD=b.

Since triangles BOC and AOD are somilar, then

$\dfrac{AO}{OC}=\dfrac{DO}{OB}=\dfrac{AD}{BC}=\dfrac{b}{a}.$

Triangles OAE and CAB are similar, then

$\dfrac{EO}{BC}=\dfar{AO}{AC}=\dfrac{b}{a+b}.$

This means that

$EO=\dfrac{ba}{b+a}.$

Similarly, from similar triangles FDO and CDB:

$OF=\dfrac{ba}{b+a}.$

Thus,

$EF=\dfrac{2ab}{a+b}.$

6 0

4 years ago

What is the additive inverse of -5

liraira [26]

Answer:

You should be thinking about a negative number. In fact, you should be thinking about a number that is the opposite of 5! -5! So, the additive inverse of 5 is -5

Step-by-step explanation:

4 0

3 years ago

Read 2 more answers

3x 2 + 7x - 5 name the terms

Ulleksa [173]

Answer:

Hello! Your answer would be, BELOW

Step-by-step explanation:

$-3x^{2} - 7x - 5$

A term is a single mathematical expression. It may be a single number (positive or negative), a single variable ( a letter ), several variables multiplied but never added or subtracted. Some terms contain variables with a number in front of them. The number in front of a term is called a coefficient.

Term's are 7x and 5

<u>Hope I helped! Ask me anything if you have questions! Brainiest plz. Hope You make a 100%! Have a nice day! -Amelia♥</u>

6 0

3 years ago

if the wheel(w) at the end of the arm is 105m from the spindle point(c) .what distance does this wheel cover in one full rotatio

fgiga [73]

Hello,

the length of the circomference is 2*π*radius
=2*π*105=659,7344572538565800771551104887... (m)

4 0

3 years ago

Combine like terms to simplify the following expressions<br><br> 5y^2 + 7y - 8y^2 - 8y + 11

jenyasd209 [6]

Answer: