All categories

3 years ago

I NEEP HELP ASAP PLEASE AND THANK YOU

Mathematics

1 answer:

sertanlavr [38]3 years ago

8 0

Answer:

The first answer, 3 times the square root of x squared is correct.

You might be interested in

HELP IN A TEST ILL GIVE BRAINLIEST

german

Answer:

Can u send a more clear pic

Step-by-step explanation:

thankyou

8 0

3 years ago

Tickets to a concert cost either $12 or $15. A

olga_2 [115]

Answer:

12x +15y = 4140; x + y = 300
x = 120; y = 180

Step-by-step explanation:

The first equation is for receipts. Each x ticket generated $12 in receipts, so the first term needs to be 12x. Each y ticket generated $15 in receipts, so the second term needs to be 15y. U in this set of equations is the total number of tickets, said to be 300.

The equations are ...

12x +15y = 4140; x +y = 300

Using the second equation to write an expression for x, we have ...

x = 300 -y

Substituting this into the first equation gives ...

12(300 -y) +15y = 4140

3600 +3y = 4140

y = (4140 -3600)/3 = 180

x = 300 -180 = 120

The number of tickets sold is ...

$12 tickets -- 120

$15 tickets -- 180

_____

You might want to notice that the equation we ended up with:

4140 -12(300) = 3y

is equivalent to this "word solution." This can be done in your head; no equations required.

If all the tickets sold were $12 tickets, the revenue would be $3600. The revenue is $540 more than that. Each $15 ticket generates $3 more revenue than a $12 ticket, so to have $540 more revenue, we must have 540/3 = 180 $15 tickets.

6 0

3 years ago

The total cost of a jacket and a pair of shoes was $99.15. if the price of the jacket was $5.81 less than the pair of shoes, wha

faust18 [17]

Let x = price of shoes
Then price of jacket would be x - 5.81
Combining the two would give you
x + x - 5.81 = 99.15
combining like terms simplifies to 2x - 5.81 = 99.15;
now adding 5.81 to both sides of the equal sign leaves
2x = 104.96
and finally, dividing both sides by 2, gives x = $52.48; which is the cost of the shoes. Recall, the cost of the jacket is 5.81 less than the cost of the shoes.
so, COST OF THE JACKET is 52.48 - 5.81 = $46.67

4 0

3 years ago

The amount of milk sold each day by a grocery store varies according to the Normal distribution with mean 130 gallons and standa

Dmitrij [34]

$\mathbb P(X>154)=\mathbb P\left(\dfrac{X-130}{12}>\dfrac{154-130}{12}\right)=\mathbb P(Z>2)$

Since approximately 95% of any normal distribution falls within two standard deviations of the mean, it follows that 5% falls outside that range, with 2.5% to either side. So $\mathbb P(Z>2)\approx0.025$ .

The actual value is a bit closer to 0.0228, but that's not very far off.

7 0

3 years ago

The results for a survey of 120 students who were selected randomly are listed below:60 students have a cell phone plan with com

vovikov84 [41]

Answer:

114

Steps listed below

Set up the proportion:

36 x

120 380

Cross Multiply to get:

120x and 13680

Divide each side by 120:

120x 13680

120 120

Answer:

x=114

8 0

3 years ago