All categories

3 years ago

12. On Saturday, Mrs. Armour bought 7 pairs of socks for $3 each, and a

Mathematics

2 answers:

Sergeu [11.5K]3 years ago

7 0

Answer:

This answer is -28

I have this problem on my school work this is what the correct answer is ;3

Tatiana [17]3 years ago

3 0

The answer is 28 $ ok I think that

You might be interested in

Music store is having a clearance sale on all of its vinyl records, CDs, and electronic downloads. For the sale, each item (viny

Travka [436]

Answer:

B. $5 for each vinyl, $4 for each CD, and $1 for each electronic download

Step-by-step explanation:

Let the prices be

Vinyl - x
CD - y
Electronic download - z

<u>Set the following equations based on the number of purchased items</u>

Sarah

3x + 4y + z = 32

Jamie

2x + 5y + 7z = 37

Frank

6x + 6z = 36 (<em>note: it can't be 30, corrected in the process of solution</em>)

Solve by substitution, simplify the third equation first

x + z = 6 ⇒ x = 6 - z

Substitute the value of x into the first two equations

3(6 - z) + 4y + z = 32

⇒ 18 - 3z + 4y + z = 32

⇒ 4y - 2z = 14

⇒ 2y - z = 7

⇒ z = 2y - 7

2(6 - z) + 5y + 7z = 37

⇒ 12 - 2z + 5y + 7z = 37

⇒ 5y + 5z = 25

⇒ y + z = 5

Solve by substitution again to get

y + 2y - 7 = 5
3y = 12
y = 4

Find z

z = 2*4 - 7 = 1

Find x

x = 6 - 1 = 5

The solution is

(5, 4, 1)

Correct choice is B

5 0

3 years ago

ASAP please help I’m failing math

MariettaO [177]

Answer:

Part A) The volume of the entire cone is $168\pi\ in^3$

Part B) see the explanation

Step-by-step explanation:

Part A) we know that

The volume of a cone is equal to

$V=\frac{1}{3}\pi r^{2}h$

where

r is the radius of the base of the cone

h is the height of the cone

In this problem triangle ABD is similar to triangle ACE

Remember that If two figures are similar, then the ratio of its corresponding sides is proportional

$\frac{AB}{AC}=\frac{BD}{CE}$

substitute the given values

$\frac{7}{14}=\frac{3}{x}$

solve for x

$x=14(3)/7\\x=6\ in$

To find out the volume of the entire cone we have

$r=CE=x=6\ in$

$h=AC=14\ in$

substitute in the formula

$V=\frac{1}{3}\pi (6)^{2}(14)$

$V=168\pi\ in^3$

Part B) How did you determine the value for x in triangle ACE

In this problem triangle ABD is similar to triangle ACE

If two figures are similar, then the ratio of its corresponding sides is proportional and its corresponding angles are congruent

$\frac{AB}{AC}=\frac{BD}{CE}$

substitute the given values and solve for x

5 0

4 years ago

if Mr. arenth wants to put new carpeting in the room shown, how many square feet should he order L= 14ft. W = 6c-8ft. L= 5+3c ft

lubasha [3.4K]

By definition, the area is given by:

$A = w * l$

Where,

w: width

l: length

We have two expressions for the length:

$L = 14\\L = 5 + 3c$

Since the length is the same, we equate both expressions:

$5 + 3c = 14$

From here, we clear the value of c:

$3c = 14 - 5\\3c = 9$

$c = \frac{9}{3}\\c = 3$

Then, we have that the width is given by:

$W = 6c-8$

Substituting the value of c we have:

$W = 6 (3) -8\\W = 18-8\\W = 10$

Finally, the area is given by:

$A = w * l\\A = 10 * 14\\A = 140 ft ^ 2$

Answer:

he should order 140 square feet

5 0

3 years ago

why does it always increase by one? will report if use this just for points and will give 200 more points if correct I need this

Tpy6a [65]

Answer:

REVENGE

Step-by-step explanation:

8 0

3 years ago

PLEASE HELP I WILL GIVE BRAINLIEST Use the rules of equations and inverse operations to solve the equation.

Leno4ka [110]

7 because I just know like how kould you not know that

6 0

3 years ago