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3 years ago

Are they equal true or false and explain why it’s true or why it’s false

Mathematics

2 answers:

Allushta [10]3 years ago

8 0

Yes it is true as

$- b = + ( - b) = + - b$

Hope it helps Also Do you like Dream , George like all people in the Dream Smp?

marta [7]3 years ago

5 0

Answer:

true

Step-by-step explanation:

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Ten video games cost $145

kompoz [17]

Answer:

each video game costs 14.5 dollars

Step-by-step explanation:

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3 years ago

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2. A bag contains 5 red marbles, 3 blue marbles, 6 white marbles, and 2 green marbles.

Georgia [21]

Answer:

Step-by-step explanation:

5 red

3 blue

6 white

2 green

total 16 marbles.

Note: P(E) = probability of event E happening

P(~E) = probability of event E NOT happening.

We usually leave probabilities in fractions whenever possible because they will not be subject to round-off errors.

A. choose one marble at random.

P(W) = 6 white / 16 total = 3/8

B. choose one marble at random.

P(~R) = (16-5)/16 = 11/16

C. choose one marble at random, then a second one without replacement,

there will be 3 blue out of 16 at the beginning, then if successful, there will be 2 blue out of 15.

P(BB) = (3/16)*(2/15) = 1 / 40

D. choose two with replacement

5 red out of 16 for first draw, still 5 red out of 16 for second draw.

P(RR) = (5/16)^2 = 25/256

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3 years ago

There are 7.48 gallons in a cubic foot. If residents of the apartment building are using the water from the tower at an average

Talja [164]

Answer:

Step-by-step explanation:

So, volume is always cubed since you have l x w x h.

A cubic ft is 12 in x 12 in x 12 in = 1728 in3. If we assumed that the aquarium has a volume of around 35328.78 in squared. Hence,

35328.78/1728 = 20.44

20.44 x 7.48 = 152.89

About 153 gallons

Noted that the water was used at the rate of 56 gallons per minute.

56 gallons -------- 1 minute

153 gallons --------- x minute (s)

56gallon × Xminutes = 153 gallons × 1 minute

X = 153/56

X = 2.7321 minutes

Hence, it will take 2.7321 minutes to drain the tower

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3 years ago

An aerial photograph from a U-2 spy plane is taken of a building suspected of housing nuclear warheads. When the photograph is t

NISA [10]

Answer:

Building is 56.58 feet long.

Step-by-step explanation:

Consider the provided information.

An aerial photograph from a U-2 spy plane is taken of a building suspected of housing nuclear warheads.

When the photograph is taken, the angle of elevation of the sun is 30°.

By comparing the shadow cast by the building in question to the shadows of other objects of known size in the photograph, scientists determine that the shadow of the building in question is 98 feet long.

As we know: $\tan\theta=\frac{opp}{adj}$

The value of tan 30 degrees is $\frac{1}{\sqrt{3} }$

$\tan30=\frac{h}{98}$

$\frac{1}{\sqrt{3}}=\frac{h}{98}$

$h=\frac{98}{\sqrt{3}}$

$h=56.58$

Hence, Building is 56.58 feet long.

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4 years ago

If y=x^2 and x=(-8) then y=

Lelu [443]

Answer:

y= 64

Step-by-step explanation:

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3 years ago

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