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bearhunter [10]
2 years ago
5

Tim wants to build a rectangular fence around his yard. He has 42

Mathematics
2 answers:
PSYCHO15rus [73]2 years ago
5 0

Answer:

I think its D

Step-by-step explanation:

Agata [3.3K]2 years ago
3 0

Answer:

D) 6w = 42; l=14

Step-by-step explanation:

since we know,

perimeter of a rectangle = 2 ( length + width)

therefore,

=> 2 ( l + w ) = 42

but we know, l = 2w

=> 2 ( 3w ) = 42

=> 6w = 42,

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A pile of 55 coins consisting of nickels and dimes is worth $3.90 . Find the number of each.
Step2247 [10]

Answer:

Answer:

Answer is: 32 nickels and 23 dimes.

x - number of nickels .

y -number of dimes.

two equations in two unknowns:

1) x + y = 55

2) 0,05x + 0,1y = 3,90.

nickel is a five-cent coin.

dime is a ten-cent coin.

solve equation 1) for x and substitute for x in equation 2)

x = 55 - y

0,05·(55 - y) + 0,1y = 3,902,75 - 0,05y + 0,1y = 3,90

0,05y = 1,15

y = 23.

x = 55 - 23 = 32.

7 0
2 years ago
The cost for the olive oil used to fill the containers on the tables in an Italian restaurant is given by the function f(x) = 5x
Firlakuza [10]

If f(4a) = 80, then the value of "a" is 4.2

<em><u>Solution:</u></em>

Given that cost for the olive oil used to fill the containers on the tables in an Italian restaurant is given by the function:

f(x) = 5x – 4

where "x" represents the number of quarts of olive oil

f(x) represents the quarts of oil used

To find: value of "a" when f(4a) = 80

Substitute x = 4a in given function

f(4a) = 5(4a) - 4

80 = 20a - 4

20a = 84

10a = 42

a = 4.2

Thus the value of "a" is 4.2

5 0
2 years ago
There are 20 teachers and 705 students in Corey's school. What is the ratio of teachers to students?
never [62]
Your answer is 4:141

Hope this helped! (:
6 0
2 years ago
Read 2 more answers
What is the maximum number of terms a fourth-degree polynomial function in standard form can have?
horrorfan [7]
A polynomial of four terms is sometimes called a quadrinomial, but there's really no need for such words.
Likewise, what is a 4th degree polynomial? Fourth degree polynomials are also known as quartic polynomials. Quartics have these characteristics: Zero to four roots. One, two or three extrema. Zero, one or two inflection points.
The degree of a polynomial is the highest of the degrees of the polynomial's monomials (individual terms) with non-zero coefficients. The degree of a term is the sum of the exponents of the variables that appear in it, and thus is a non-negative integer.
Zero Polynomial. The constant polynomial. whose coefficients are all equal to 0. The corresponding polynomial function is the constant function with value 0, also called the zero map. The zero polynomial is the additive identity of the additive group of polynomials.
3 0
2 years ago
The length of a room is 2 times it's breadth and 5 times of it's height.If the volume of the room is 800 m cube find the cost of
Anit [1.1K]

The length of a room is 2 times it's breadth and 5 times of it's height.If the volume of the room is 800 m cube find the cost of papering it's wall at rs 6 per m²

Answer:

Rs. 1440

Step-by-step explanation:

Given that:

Breadth = b

Length = 2b

Height = 2b/5

Volume = b * 2b * 2b/5

Volume = 800 m³

800 = b * 2b * 2b/5

800 * 5 = 4b³

4000 = 4b³

4000/4 = 4b³/4

1000 = b³

10³ = b³

b = 10m

Length = 2 * 10 = 20m

Height = (2 * 10) / 5 = 4m

If plastering is at Rs. 6 per m²

Surface area:

2(lenght + breadth) height

2(20 + 10)4

2(30)4 = 240m²

Rs. 6 * 240 = Rs. 1440

8 0
2 years ago
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