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3 years ago

7

Instructions: Find the angle measures given the figure is a rhombus.

1 answer:

Oksi-84 [34.3K]3 years ago

8 0

Answer:

Angle ABC =70

Step-by-step explanation:

Divide 140 by 2 and apply the rule of alternante interior angles

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Barbara drives between Miami, Florida and West Palm Beach, Florida. she drives 45 miles in clear weather and then encounters a t

WINSTONCH [101]

Answer:

Barbara's speed in clear weather is $60mph$ and in the thunderstorm is $38mph$ .

Step-by-step explanation:

Let $v_1$ be the speed and $t_1$ be the time Barbara drives in clear weather, and let $v_2$ be the speed and $t_2$ be the time she drives in the thunderstorm.

Barbara drives 22 mph lower in the thunderstorm than in the clear weather; therefore,

(1). $v_2 = v_1 -22$

Also,

(2). $v_1t_1 = 45miles$

(3). $v_2 t_2 = 57$ ,

and

(4). $t_1+t_2 = 2.25hr$

From equations (2) and (3) we get:

$t_1 = \dfrac{45}{v_1}$

$t_2 =\dfrac{57}{v_2}$

putting these in equation (4) we get:

$\dfrac{45}{v_1}+\dfrac{57}{v_2}=2.25$

and substituting for $v_2$ from equation (1) we get:

$\dfrac{45}{v_1}+\dfrac{57}{v_1-22}=2.25$

This equation can be rewritten as

$2.25v_1^2-151.5v_1+990=0$

which has solutions

$v_1 = 60$

$v_1 = 7.33$

We take the first solution $v_1 =60$ because it gives a positive value for $v_2:$

$v_2 = v_1 -22$

$v_2 = 60 -22\\$

$v_2 = 38$ .

Thus, Barbara's speed in clear weather is $60mph$ and in the thunderstorm is $38mph$ .

4 0

4 years ago

Describe the error in the picture?

Veseljchak [2.6K]

Answer:

it says 2 for $10 when you can easily get 2 for $7.60

Step-by-step explanation:

6 0

3 years ago

The result of which expression will best estimate the actual product of (Negative four-fifths) (three-fifths) (Negative StartFra

sattari [20]

Answer:

The Answer Is B

Step-by-step explanation:

-4/5 = -1 (Rounded)

3/5 = 1/2 (Rounded)

-6/7 = -1 (Rounded)

5/6 = 1 (Rounded)

If your looking for the whole thing it would be:

(-1)[1/2](-1)(1) = x

Your Welcome! <3

6 0

4 years ago

Evaluate 3-8/2 +3x5

wolverine [178]

<h2>Answer:</h2><h2>3-8/2+3×5</h2><h2>5/2</h2><h2>2.5 + 3×5</h2><h2>2.5+15</h2><h2>= 17.5*</h2>

3 0

3 years ago

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Will Name Brainliest!!!!!!! :)

Len [333]

A' (0,4) respuesta es

espero que te sirva marcarme como mejor respuesta PORFA y gracias

3 0

3 years ago

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