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3 years ago

Pls help I’m really confused How are vertical

1 answer:

7 0

Vertical angles:
Vertical Angles are the angles opposite each other when two lines cross.
https://www.mathsisfun.com/geometry/vertical-angles.html
The link has a visual of vertical angles.

Adjacent Angles:
Adjacent angles are two angles that share a common vertex point and a common side. They basically sit right next to each other.
https://www.mathsisfun.com/geometry/adjacent-angles.html
The link has a visual of adjacent angles.

Complementary Angles:
Two angles whose measures add to 90º.
Basically, together they make a right angle.

Supplementary Angles:
Two angles whose measures add to 180º.
Basically, together they form a straight line.

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Is triangle ABC ~triangle PQR ? support your answer with a theorem or a posture

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3 years ago

Find the value of the expression (2^6 times 10^18)/(2^24 times 25^9)

PtichkaEL [24]

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Step-by-step explanation:

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3 years ago

Which of the following expressions are meaningful? Which are meaningless? Explain. (a) (a · b) · c (a · b) · c has ---Select---

rodikova [14]

Answer:

(a) (a · b) · c has Meaningless because it is the dot product of two scalars.

(b) (a · b)c has Meaningful because it is a scalar multiple of a scalar and a vector .

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4 0

3 years ago

Can I Have The Answer? It’s a disgusting hard homework, and I would really appreciate it if you helped me.

Semenov [28]

Answer:

-2c + 8d - 6

-6 + 5d - 2c + 3d

Step-by-step explanation:

When multiplying terms in a bracket, you need to multiply the term outside the bracket to all the terms in the bracket.

- $\frac{2}{5}$ (15-20d+15c) = (- $\frac{2}{5}$ × 15) + (- $\frac{2}{5}$ × -20d) + (- $\frac{2}{5}$ × 15c)

Two minuses make a plus. One minus and one plus make a minus.

(- $\frac{2}{5}$ × 15) + (- $\frac{2}{5}$ × -20d) + (- $\frac{2}{5}$ × 15c) = (-6) + (8d) + (-2c)

Note that the terms can be presented in any order and still be correct.

(-6) + (8d) + (-2c) = -6 + 8d - 2c

Let us go through the options to see which ones are correct:

-2c + 8d - 6: Since all the terms are there, this option is correct!

-c + 40d - 8: Since none of the terms is there, this option is wrong.

-4c + 40d - 8: Since none of the terms is there, this option is wrong.

-3c + 8d - 3: Since (-3c) and (-3) are not the correct terms, this option is wrong.

-6 + 5d - 2c + 3d: If we evaluate the like terms (5d and 3d), the final answer would be -6 + 8d - 2c so this option is also correct!

8 0

3 years ago

the cost of running an appliance varies jointly as the number of watts used, the hours of operation, and the cost per kilo-watt

zhuklara [117]

Suppose:
C=cost
c=cost per kilo-watt hour
w=number of watts
h=number of hours
thus
C=kwhc
where:
k=constant of proportionality:
k=C/(whc)
but
C=15 when w=6000, h=10/60=1/6 hours, c=7.5 cents per kw/h
thus
k=15/(6000*1/6*7.5)
k=0.002
thus:
C=0.002(whc)
hence:
when
h=70*2=140=140/6=70/3 hours the cost will be:
C=0.002(6000*70/3*7.5)
C=2100 cents
C=$21

7 0

4 years ago