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3 years ago

PLS HELP WILL MARK YOU BRAINLIEST NO FAKE ANSWERS

Mathematics

1 answer:

Nataly [62]3 years ago

6 0

Answer:

2,520 - 140x

Step-by-step explanation:

It's 140 feet per minute, so if you need to find it's height after x minutes you just plug in your value for x.

Please mark brainliest if possible and have a nice day!

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Evaluate the expression.<br> -8.x – 3y if x = 4 and y = -2

AURORKA [14]

Answer:

-8.4 + 6 hope this helped!

Step-by-step explanation:

7 0

3 years ago

Read 2 more answers

The Earth rotates every 24 hr and as diameter of 7, 926 mi. If you're standing on the equator, how fast are you traveling in mil

Vlada [557]

<h3>Answer: Approximately 1038 mph</h3>

The more accurate value is 1037.51097384802

Round that however you need to.

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

Explanation:

We need the circumference of the equator. Think of the equator as the largest possible circle (or belt) to fit around the earth.

C = pi*d

C = pi*7926

C = 7926pi

C = 24,900.2633723527

In 24 hours, a person at the equator travels roughly 24,900.2633723527 miles since the earth does a full rotation in this timespan.

Divide the two quantities distance over time to get the speed

rate = distance/time

rate = (24,900.2633723527 miles)/(24 hours)

rate = ( (24,900.2633723527)/(24) ) miles per hour

rate = 1,037.51097384802

rate = 1038 mph

I'm rounding to 4 sig figs since the diameter is given to be in four sig figs.

This speed of roughly 1038 mph is a linear speed and not an angular speed.

-----------------------------

Extra info (optional section)

Upon further research, I found an article from NASA JPL (jet propulsion laboratory) which states quote:

<em>"To make one complete rotation in 24 hours, a point near the equator of the Earth must move at close to 1000 miles per hour (1600 km/hr)"</em>

Their figure of 1000 mph seems to be a rough estimate, more or less. It's fairly close to the 1038 figure we got earlier.

8 0

3 years ago

A home’s value increases at an average rate of 5.5% each year. The current value is $120,000. What function can be used to find

Pachacha [2.7K]

Answer:

$f(x)=120,000 \times (1.055)^{x}$ .

Step-by-step explanation:

We are given that,

The present value for the home is $120,000 and the rate of interest is 5.5% i.e. 0.055.

As we know that the function for the home is given by,

$f(x)=P \times (1+r)^{x}$

where P = present value, r = rate of interest, x = number of years.

So, according to the question, we get that,

$f(x)=120,000 \times (1+0.055)^{x}$

i.e. $f(x)=120,000 \times (1.055)^{x}$ .

Hence, we see that the function that represents the value of the home is $f(x)=120,000 \times (1.055)^{x}$ .

6 0

3 years ago

Read 2 more answers

PLEASE HELP !! ILL GIVE BRAINLIEST *EXTRA POINTS*.. <br> IM GIVING 40 POINTS !! DONT SKIP :((.

Arlecino [84]

Y=48x+44 because the rate is 44 per month which equals b plus the total 48

3 0

3 years ago

Use the values listed in the table to answer the question.

antoniya [11.8K]

Answer:

B. (b x d) - c

Step-by-step explanation:

i. -(a x d) + b

= -(6 x $\frac{1}{2}$ ) + 8

= -3 + 8

= 5

ii. (b x d) - c

(8 x $\frac{1}{2}$ ) - 4

= 4 - 4

= 0

iii. 2(b x f) + a

= 2(8 x $\frac{1}{4}$ ) + 6

= 4 + 6

= 10

iv. (a x e) - c

= (6 x $\frac{1}{3}$ ) - 4

= 2 - 4

= -2

Thus, the expression which is equivalent to 0 is that of option B.

4 0

3 years ago