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Ira Lisetskai [31]
4 years ago
6

Alexis has some dimes and quarters.

Mathematics
2 answers:
WINSTONCH [101]4 years ago
7 0

Answer:

C. d + q = 5.80

0.10d + 0.25q = 40

Step-by-step explanation:

We are given a situation where Alexis has some dimes and quarters, all her coins have a value of $5.80 / and have a total of 40 coins.

So lets look at the equation for 40 coins.

We are looking for how many dimes and quarters equal to $5.80 and make up 40 in total

Therefore :

We have to add dimes and quarters together to make up $5.80 dollars

d + q = 5.80

This makes B. Incorrect because it has d + q = 40 instead of d + q = 5.80

Now for the amount of coins in total.

We have to find the amount of each coin costs. So a quarter is 25 cents, and a dime is 10 cents. So we add those together to make up 40 coins in total.

0.10d + 0.25q = 40

A. becomes incorrect because is has 40d + 40q = 5.80, which already goes over the amount asked and does not have the correct system of equation.

Therefore leaving you with C.

exis [7]4 years ago
4 0

Answer:

Step-by-step explanation:

make two equations

one equation is about the money and one is about counting how many coins

Money equation :   .10d + .25q = 5.80

this assigns the value of the dimes at 10 cents and the value of the quarters at 25 cents.

counting equation:     d +     q   = 40

so the answer is C

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Pls help due ASAP....<br> Pls show workings.
Ann [662]

Answer:

We can conclude that the distance from Sandy's Hotel to Trader Joes' Store is:

  • d = 8.06 miles

Step-by-step explanation:

From the coordinate plane, we can clearly identify that:

  • Sandy's Hotel is located at the point (-8, 9)
  • Trader Joes' Store is located at the point (-4, 2)

The distance from Sandy's Hotel to Trader Joes' Store can be calculated such as:

d=\:\sqrt{\left(x_2-x_1\right)^2+\left(y_2-y_1\right)^2}

The distance between (-8, 9) and (-4, 2)

d=\sqrt{\left(-4-\left(-8\right)\right)^2+\left(2-9\right)^2}

  =\sqrt{\left(-4+8\right)^2+\left(2-9\right)^2}

  =\sqrt{4^2+7^2}  

   =\sqrt{16+49}

    =\sqrt{65}

    =8.06 miles

Therefore, we can conclude that the distance from Sandy's Hotel to Trader Joes' Store is:

  • d = 8.06 miles
8 0
3 years ago
The parallelogram shown below has an area of 21 units.<br><br> Find the missing height.
nlexa [21]

Answer:

8

544+65+6+6+646546141

8 0
3 years ago
Read 2 more answers
Use Order of Operations<br> to solve. PEMDAS<br> 9 + 6(2²+4)
gregori [183]

Answer:

57

Step-by-step explanation:

9+6(2^2+4)

Calculate 2 to the power of 2 and get 4.

9+6(4+4)

Add 4 and 4 to get 8.

9+6×8

Multiply 6 and 8 to get 48.

9+48

Add 9 and 48 to get 57.

57

6 0
3 years ago
AMERICAN AIRLINES HAS A POLICY OF BOOKING AS MANY AS 15 PEOPLE ON AN AIRPLANE THAT CAN SEAT ONLY 14. (PAST STUDIES HAVE REVEALED
Blizzard [7]

Using the binomial distribution, there is a 0.0874 = 8.74% probability that not enough seats will be available.

<h3>What is the binomial distribution formula?</h3>

The formula is:

P(X = x) = C_{n,x}.p^{x}.(1-p)^{n-x}

C_{n,x} = \frac{n!}{x!(n-x)!}

The parameters are:

  • x is the number of successes.
  • n is the number of trials.
  • p is the probability of a success on a single trial.

For this problem, the values of the parameters are given by:

n = 15, p = 0.85.

The probability that not enough seats will be available is P(X = 15), as the only outcome in which not enough seats will be available is when all 15 people who bought the ticket show up, hence:

P(X = x) = C_{n,x}.p^{x}.(1-p)^{n-x}

P(X = 15) = C_{15,15}.(0.85)^{15}.(0.15)^{0} = 0.0874

0.0874 = 8.74% probability that not enough seats will be available.

More can be learned about the binomial distribution at brainly.com/question/24863377

#SPJ1

8 0
1 year ago
First I will build the envelope. For this, I am using a rectangular piece of material 28m long and 12m wide. Out of this materia
RUDIKE [14]

Answer:

3.728 cm²

90

Step-by-step explanation:

To built the envelope I am using a rectangular piece of material 28 m long and 12 m wide.  

Out of this material, I have to cut patches that are 1/12 the length and 2/15 the width of the whole material.

So, the length of the patches is 28 \times \frac{1}{12} = 2.33 m and the width of the patches is 12 \times \frac{2}{15} = 1.6 m.

Therefore, the area of the patches is (1.6 × 2.33) = 3.728 m² each. (Answer)

Now, the area of the rectangular piece of material is (28 × 12) = 336 m²

Hence, \frac{336}{3.728} = 90.37 ≈ 90 such patches can be made out of the whole material. (Answer)

3 0
3 years ago
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