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Blizzard [7]
3 years ago
11

Emily is buying 2/5 of a pound of beans for dinner.Ricki is buying 1 3/4 of the amount of beans that Emily is buying.How many po

unds of beans is Ricki buying
Mathematics
2 answers:
Scorpion4ik [409]3 years ago
3 0
1 3/4×2/5=7/10 Ricki bought 7/10 pounds
Flauer [41]3 years ago
3 0

Answer: \dfrac{7}{10} pounds.

Step-by-step explanation:

Given : Emily is buying \dfrac{2}{5} of a pound of beans for dinner.

Ricki is buying 1\dfrac{3}{4} of the amount of beans that Emily is buying.

Here, 1\dfrac{3}{4} can be written as \dfrac{4+3}{4}=\dfrac{7}{4}

Then, the amount of beans bought by Ricky is given by :_

\dfrac{7}{4}\times\dfrac{2}{5}\\\\=\dfrac{7}{10}

Hence,  Rick is buying \dfrac{7}{10} pounds.

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60 musicians applied for a job at a music school. 14 of the musicians play both guitar and drums. What is the probability that t
Alika [10]

Answer:

The probability is 8 over 15.

Step-by-step explanation:

14 of the musicians play both guitar and drums, 28 play drums, 18 play the guitar.

It means n(G and D)=14, n(D)=28, n(G)=18.

Using the formula of Union:-

n(G or D) = n(G) + n(D) - n(G and D).

n(G or D) = 18 + 28 - 14.

n(G or D) = 32.

It says 60 musicians applied for a job at a music school. So n(U)=60.

The probability that the applicant who gets the job plays drums or guitar is = n(G or D)/n(U) = 32/60 = 8/15.

Hence, the probability is 8 over 15.

Read more on Brainly.com - brainly.com/question/12053357#readmore

5 0
3 years ago
A plumbing supply company has fixed costs of $9,000 per month and average variable costs of $9.30 per unit manufactured. The com
nekit [7.7K]

Answer:

8710 units

Step-by-step explanation:

<em>Step 1: Write all the data</em>

Fixed cost: $9000

Average variable cost: 9.3 per unit

Total cost: 90,000

Total units: x

<em>Step 2: Find the total variable cost</em>

Average variable cost is per unit so it has to be multiplied by the number of units to find the total variable cost.

Total variable cost = average variable cost per unit x number of units

Total variable cost = 9.3x

<em>Step 3: Make the formula for finding x</em>

Total cost = total fixed cost + total variable cost

90,000 = 9000 + 9.3x

81000 = 9.3x

x = 8709.67

Rounded off to 8710 units

!!

3 0
3 years ago
Solving for angles - Geometry
Otrada [13]

Answer:

<BAC=19

Step-by-step explanation:

<AOB=<DOC=142

<BAC=<ABD

2<BAC=180-142

2<BAC=38

<BAC=38/2

<BAC=19

7 0
3 years ago
Read 2 more answers
The two-way table represents the results of a random survey taken to determine the preferred vehicle for male and female drivers
inn [45]

Answer:

Step-by-step explanation:

6 0
2 years ago
Find the largest prime divisor of $15^6 - 7^6$<img src="https://tex.z-dn.net/?f=Find%20the%20largest%20prime%20divisor%20of%20%2
Novosadov [1.4K]

Answer:

Largest prime factor of the given expression is <em>379.</em>

Step-by-step explanation:

Given the expression:

15^6 - 7^6

To find:

The largest prime factor of the given expression.

Solution:

First of all, let us factorize the given expression.

15^6 - 7^6\\\Rightarrow (15^3)^2 - (7^3)^2\\\\\text{Using } x^{2} -y^2 = (x+y) (x-y)\\\\\Rightarrow (15^3+7^3)(15^3-7^3)

Let us learn two formula:

x^3+y^3 = (x+y)(x^2+y^2-xy)

x^3-y^3 = (x-y)(x^2+y^2+xy)

Applying the above formula in the expression written above:

(15^3+7^3) = (15+7)(15^2+7^2-15\times 7)\\\Rightarrow 22(225+49-105 ) = 2 \times 11 \times 169 \\\Rightarrow 2 \times 11\times 13\times 13\\\Rightarrow 2 \times 11\times 13^2 ...... (1)

Similarly:

(15^3-7^3) = (15-7)(15^2+7^2+15\times 7)\\\Rightarrow 8(225+49+105 ) = 2^3 \times 379........ (2)

Multiplying the expressions from (1) and (2) to get the result:

\therefore 15^6 - 7^6 = 2^4 \times 11 \times \underline{\bold{379}} \times 13 ^2

So, largest prime factor of the given expression is <em>379.</em>

7 0
3 years ago
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