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3 years ago

Long-grain rice costs $0.72/lb. How much would 2.7 lb of long-grain rice cost?

2 answers:

7 0

If $.72 per 1lb, then $x per 2.7lb, by using proportional property:

.72/1 = x/2.7 cross multiply

x = (.72)*(2.7) = $1.94

sweet-ann [11.9K]3 years ago

7 0

Answer:

The cost of the 2.7 lb of long - grain rice is $1.94 .

Option (C) is correct .

Step-by-step explanation:

As given

Long-grain rice costs $0.72/lb.

i.e Cost of long - grain per pound is $0.72 .

Now find out the cost for 2.7 lb long - grain rice .

Cost of 2.7 lb long - grain rice = 2.7 × Cost per pound

Putting values in the above

= 2.7 × 0.72

= $ 1.94 (Approx)

Therefore the cost of the 2.7 lb of long - grain rice is $1.94 .

Option (C) is correct .

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Copy the expressions which are polynomials. Give reasons why the remaining are

kupik [55]

Answer: a and c are polynomials, b is not.

Step-by-step explanation:

A polynomial p(x) is written as:

p(x) = aₙ*xⁿ + ... + a₂*x² + a₁*x¹ + a₀*x⁰

where x is the variable, and the numbers aₙ, aₙ₋₁, ..., a₁, a₀ are the coefficients of the polynomial, such that aₙ is the leading coefficient, and the value of n (always a natural number) is the degree of the polynomial.

Notice that the powers need to be always natural numbers.

Now, let's analyze the options:

a) 3*x - 2

We can rewrite this as:

3*x¹ - 2*x⁰

Then this is a polynomial.

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the second term can be written as:

1/p = p⁻¹

Then we have a term with a negative power of p, this means that this is not a polynomial.

c) 3*y² - 2*y/3 + 1

Same as in the first case, we can rewrite this as:

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3 years ago

Drag the choices into the boxes to explain how all real numbers have a decimal expansion.

KATRIN_1 [288]

The decimal forms of some real numbers, like( 3/16), terminate, while the decimal forms of other real numbers, like(4 2/11 ), do not terminate, but have a repeating pattern. Still, other real numbers, like(5 squared ), have decimal forms that neither terminate nor repeat.

Step-by-step explanation:

1. The decimal forms of some real numbers, like( ), terminate

A number is terminating if it has decimal with finite number

So, $\frac{3}{16}= 0.1875$ as decimal stops after 4 digits so it is terminating.

2. the decimal forms of other real numbers, like( ), do not terminate, but have a repeating pattern.

A number that do not terminate, but have a repeating pattern.

So, $4 \frac{2}{11} =\frac{44}{11}=4.1818181$

3. have decimal forms that neither terminate nor repeat

5^2 = 25 it neither terminates nor repeat

So, answers will be:

Keywords: Decimals

Learn more about decimals at:

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2 years ago

A triangle has two sides of length 20 and 11. What is the largest possible whole-number length for the third side?

charle [14.2K]

Answer:

Step-by-step explanation:

20+11=31

It can't be exactly 31 but it can be any number less than 31, so the nearest whole number down is 30

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2 years ago

the angle of elevation of the top of a building from a point 80 ft away from the building on level ground is 70° determine the b

MA_775_DIABLO [31]

Draw a triangle with shortest side on the ground (horiz.). The length of this side is 80 feet. Two angles touch the ground: a right angle, and the 70 degree angle.

Then the height of the building is the 2nd shortest side.

The tangent function is the appropriate one to use here:
opp h
tan 70 deg = -------- = ----------
adj 80 ft
h
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so h = building height = (80 ft)(2.75) = 219.8 ft

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3 years ago

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Answer:

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