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2 years ago

Please help me please it is hard

Mathematics

2 answers:

Arturiano [62]2 years ago

3 0

Which one first show me your problem

Inessa05 [86]2 years ago

3 0

What's the question? Didn't show up

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Multiply (3x-4)(6x+7

Hitman42 [59]

Multiplying ,you get 18x^2+21x-24x-28. You simplify to get:

18x^2-3x-28.

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3 years ago

,please help me solve these 2. problems I am having trouble

Harlamova29_29 [7]

Hi,

1) D

Working :
If the bell rings for 2 weeks straight that means it rings for 14 days.

The bell rings 48 times a day (2 * 24).

The answer is then: 48*14 = 672

2) C

Working:

144 cookies * 8 batches = 864 cookies

864 divided into boxes of 8 = 864 / 8 = 108

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2 years ago

In a research laboratory, a scientist measures the mass of a 1-carat diamond and finds it to be 200 milligrams, measured to the

vlada-n [284]

Answer:

$D=3.5\ gr/cm^3$

Step-by-step explanation:

<u>Density</u>

The density of an object of mass m and volume V is given by

$\displaystyle D=\frac{m}{V}$

It can be expressed in common units like $gr/lt, Kg/m^3, gr/cm^3$ or any other combination of proper mass [M] by volume [V] units.

The data provided in the question is

$m=200\ mg = 0.2\ gr$

$V=0.057\ cm^3$

Thus, the measured density is

$\displaystyle D=\frac{0.2\ gr}{0.057 \ cm^3}$

$\boxed{D=3.5\ gr/cm^3}$

We have expressed the result with 1 decimal place because the mass was measured to the nearest hundred milligrams (or one-tenth grams). Any further decimal is senseless because that precision comes from calculations, not from measurements.

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2 years ago

There are 3 blouse and 2 pieces cloths for sale in the market. how many possible sets are there?

Andrew [12]

Answer:

Each item could be included in a set or not included. That gives 2^5 = 32 ways to choose sets, including 1 set with no items, 5 sets of 1 item, 10 sets of 2 items, 10 sets of 3 items, 5 sets of 4 items, and 1 set of 5 items.

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3 years ago

Gary invested $1,000 into an account earning interest at an annual rate of 5% compounded annually. Each year, he deposited an ad

coldgirl [10]

This one is too complicated for me

6 0

3 years ago