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Mathematics 9 Online
OpenStudy (mutie):

PLEASE HELP!!

OpenStudy (mutie):

Kendra has a painting canvas that is 21 inches wide by 38 inches high. She painted a red rose, which covered 40% of the canvas. What was the area of the canvas which was covered by the red rose? A. 319.2 in2 B. 798 in2 C. 127.68 in2 D. 39.9 in2

OpenStudy (misty1212):

HI!!

OpenStudy (misty1212):

the canvas has area \[21\times 38\]take \(40\%\) of that by multiplying by \(.4\)

OpenStudy (mutie):

So I multiply 21 x 38 then I multiply the answer by .4?

OpenStudy (misty1212):

sure or do it all at once with a calculator http://www.wolframalpha.com/input/?i=.4*38*21

OpenStudy (mutie):

Can you help me with some other questions?

OpenStudy (misty1212):

lol if i can

OpenStudy (mutie):

Ellis is going on a tour that costs $58 while on vacation. He was told to bring $93 to pay for the cost of the tour and dinner. Which of the following inequalities represents the money Ellis can spend on dinner? A. $93 + d < $58 B. $58 + d < $93 C. $58 + d > $93 D. $93 + d > $58

OpenStudy (misty1212):

i would go with B since he cannot spend more that $93 and he has to spend $58

OpenStudy (mutie):

Directions: Type the correct answer in the box. Use numerals instead of words. If necessary, use / for the fraction bar. Clarissa works in sales for a software company. Her pay each month varies since each month she receives base pay of $2,400.00 plus 8% commission on her sales. During the month of November, Clarissa had $18,000.00 in sales. For the month of November, ___ % of Clarissa's pay was from her commission.

OpenStudy (misty1212):

ooh this takes a couple steps

OpenStudy (misty1212):

\[18,000\times .08=1440\] so total pay was \[24000+1440=25440\]

OpenStudy (misty1212):

you want to compute \[\frac{1440}{25440}\] as a percent

OpenStudy (misty1212):

i think i messed up

OpenStudy (mutie):

So the answer would be 25440?

OpenStudy (mutie):

Oh its ok

OpenStudy (misty1212):

total pay is \[1440+2400=3840\]

OpenStudy (misty1212):

so we do \[\frac{1440}{3840}\]

OpenStudy (misty1212):

looks like \(37.5\%\) http://www.wolframalpha.com/input/?i=1440%2F3840

OpenStudy (mutie):

So the answer would be37.5% ?

OpenStudy (misty1212):

yes

OpenStudy (mutie):

In the figure below, triangle ABC is an equilateral triangle, and quadrilateral DEFB is a square. Note: picture not drawn to scale What is mABD? A. 50° B. 45° C. 30° D. 20°

OpenStudy (misty1212):

\[90-60=30\]

OpenStudy (mutie):

Which of the following is approximately equal to the expression below? \[\frac{ 61 }{ 3 }\div \frac{ 19 }{ 4 }\] A. 3 B. 4 C. 6 D. 5

OpenStudy (misty1212):

got a calculator?

OpenStudy (mutie):

yes

OpenStudy (misty1212):

that is the best way

OpenStudy (misty1212):

but you are supposed to say \[20\div 5=4\]

OpenStudy (mutie):

Indicate which property is illustrated in Step 1. Step 1 3 + (6 + 7) + 0 = 3 + (7 + 6) + 0 Step 2 = (3 + 7) + (6 + 0) Step 3 = (3 + 7) + 6 Step 4 = 10 + 6 A. commutative property of multiplication B. distributive property C. commutative property of addition D. identity property of addition

OpenStudy (misty1212):

the 6 and 7 traded places that is the commutative law of addition

OpenStudy (mutie):

If the square pyramid shown above is sliced by a plane that is parallel to the base, which of the following is the most specific description of the cross-section of the pyramid? A. square B. rectangle C. isosceles triangle D. triangle

OpenStudy (mutie):

@misty1212

OpenStudy (mutie):

:/

OpenStudy (mutie):

@♪Chibiterasu

OpenStudy (mutie):

@amistre64 @perl

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