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ivanzaharov [21]
3 years ago
12

4/5[x+8}=12 what does x egual

Mathematics
2 answers:
astraxan [27]3 years ago
7 0

Answer:

X= 7

Step-by-step explanation:

makvit [3.9K]3 years ago
6 0

Answer:

7

Step-by-step explanation:

7+8=15

5×3=15

4/5×15=12

if that makes sense

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The denominator of a fraction is three more than the numerator. When both are increased by 1 the fraction becomes 1/2. What is t
Akimi4 [234]

Answer:

2/5

Step-by-step explanation:

Let x = numerator

3 + x = denominator

\frac{x}{3+x}

the numerator and denominator are increased by 1 , the fraction becomes

\frac{x + 1}{4 + x} = \frac{1}{2}

cross multiply

2(x + 1 ) = 4 + x

2x + 2 = 4 + x

combine like terms

2x - x = 4 - 2

x = 2 = numerator

denominator = 2 + 3 = 5

2/5 fraction

8 0
3 years ago
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3 years ago
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Susan received $27 for 6 hours of work. Ricky received $14.25 for 3 hours of work. Which statement is true about there hourly ra
8090 [49]

Answer: C. Rickys rate was 0.25 more per hour" .

Step-by-step explanation:

Susan received $27 for 6 hours of work. Susan's rate we hour will be:

= $27/6

= $4.5

Ricky received $14.25 for 3 hours of work. Ricky's rate will be:

= $14.25/3

= $4.75

From the option given, the correct option is C "Rickys rate was 0.25 more per hour" .

This is because $4.75 - $4.5 = $0.25

3 0
3 years ago
Luci Lulu opened a cookie store in the mall. She found that the relationship between the price of a cookie, p, and the number of
bekas [8.4K]

Answer:

The maximum revenue Luci Lulu can make selling cookies in one day is $2,000.

The price Luci Lulu should sell the cookies to make the maximum revenue is $1.

Step-by-step explanation:

From the question, we have:

x = −2000p + 4000 ..................... (1)

Where;

x = number of cookies sold

p = price of a cookie, p, and the

Revenue function (R) can therefore be obtained as follows:

R = px ……………………….. (2)

If we substitute equation (1) into (2), we will have:

R = p(−2000p + 4000)

R = −2000p^2 + 4000p ……………… (3)

Differentiating equation (3) with respect to p and set it equal to zero, we have:

−4000p + 4000 = 0

Solving for p, we have:

4000 = 4000p

p = 4000 / 4000

p = 1

Therefore, this implies the price Luci Lulu should sell the cookies to make the maximum revenue is $1.

Substituting p = 1 into equation (3), we have:

R = (−2000 * 1^2) + (4000 * 1)

R = (−2000 * 1) + (4000 * 1)

R = −2000 + 4000

R = 2000

This implies that the maximum revenue Luci Lulu can make selling cookies in one day is $2,000.

6 0
3 years ago
What is equalvent to 7:15 A 21:45 b 14:45 c 3:5 d65:135
Ivanshal [37]

Answer:

its a 21:45

Step-by-step explanation: it a because 7x3 will equal 21  you got 21 in there. 15 x 3 will equal 45 and you got 45 there so a is your answer.

5 0
2 years ago
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