When Marla rounded 19.95 to the nearest tenth, she found the number changed to 20.is this correct

Answers

Answer 1

Answer: Yes, Marla is correct.

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What is the value of x squared =169

Answers

$x^(2) =169\n \n x^(2)=13^2\ \ \ \Leftrightarrow\ \ \ x=13\ \ \ or\ \ \ x=-13$

3x+4y=2 4x-4y=12 by using elimination

Answers

(+3x+4y=2)
(+4x-4y=12)
-----------------
7x = 14
-----------------
7
X=2

3(2)+4y=2
6+4y=2
4y=-4
Y=-1.
Or you can plug x into the other equation.

4(2)-4y=12
8-4y=12
-4y=4
Y=-1.

Help me please I might need help with more also

Answers

All you have to do is 72/6
I hope I helped!
:)

Mario was visiting the carnival when he noticed a few number relationships.He made then into brainteasers for you.

a. If three-tenths of the visitors were adults and there were 100 visitors, how many visitors were adults?

b. Five-eighths of the prizes at the Giant Spin were dolls. If there were 64 prizes, how many prizes were NOT dolls?

Answers

Answer: a) 30 and b) 24.

Step-by-step explanation:

Since we have given that

a) Number of visitors = 100

According to question, we get that If three-tenths of the visitors were adults.

So, number of adults would be

$(3)/(10)* 100\n\n=3* 10\n\n=30$

b) Number of prizes = 64

According to question, Five-eighths of the prizes at the Giant Spin were dolls.

So, Number of prizes are not dolls is given by

$(1-(5)/(8))* 64\n\n=(3)/(8)* 64\n\n=3* 8\n\n=24$

Hence, a) 30 and b) 24.

100/1 x3/10=30 adults

B. 5/8 x64/1 =40 dolls

therefore 64-40=24 were not dolls

Corey needs 24 boards that are 47 1/2 inches long.A. how many feet of boards should he buy? explain.
B. If you can only buy 8-foot boards, how many should he buy?explain

Answers

Answer with explanation:

Number of boards need by corey =24

Length of each board is $47 (1)/(2)\n\n=(95)/(2)$

Length in inches of board that corey should buy

$(95)/(2)* 24\n\n=95*12\n\n=1140$ inches

1 foot=12 inches

$(1)/(12) \text{foot}=1\text{inches}\n\n(1140)/(12) \text{foot}=1140\text{inches}\n\n95\text{foot}=1140\text{inches}$

So, Length in feet of board =95 foot

Length of each board = 8 foot

Total Length in feet of board =95 foot

So, number of boards that corey should buy

$(95)/(8)\n\n=11(7)/(8)$

=Approximately 12 Boards

A. 95 feet
B. 12, because that would get you 96 feet of board, and if you only got 11, then you would only have 88 feet of boards which is not enough.

A man bought a dozen boxes each with 24 highlighter pens inside for $ 8 each box he repacked these boxes into packages of six highlighters each and sold them for $ 3 per package how much profit did he make?

Answers

The profit he made from the boxes is $48 .

What is a word problem?

A word problem is a verbal description of a problem situation. It consists of few sentences describing a 'real-life' scenario where a problem needs to be solved by way of a mathematical calculation.

For the given situation,

A dozen boxes = 12 boxes

Number of highlighter pens in each box = 24

Total number of highlighter pens = $(12)(24)$

⇒ $288$ pens

Price for each box = $8

Total price for 12 boxes = $(12)(8)$

⇒ $\$ 96$

He repacked these boxes into packages of six highlighters each,

⇒ $(288)/(6)$

⇒ $48$ boxes

Price per package = $3

Total price for 48 boxes = $(48)(3)$

⇒ $\$ 144$

Thus profit = $144-96$

⇒ $\$48$

Hence we can conclude that the profit he made from the boxes is $48 .

Learn more about word problems here

brainly.com/question/20594903

#SPJ3

he brought 12 boxes (dozen) with 24 pens.. okay and each are 8 bucks. 24 x 12 = 288 (pens total)
12 x 8 = $96 (spent total)

6 pens = one package for $3
288 pens divided by 6 ... = 48 packages
48 x 3 = $144 (sold total)

144-96 = $48 (profit)

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