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jasenka [17]
3 years ago
13

Help with homework (math flavored)

Mathematics
2 answers:
Tomtit [17]3 years ago
5 0

Answer:

Step-by-step explanation:

Do it on a Calculator

9966 [12]3 years ago
3 0

Answer:

6.2

Step-by-step explanation:

First you need to follow order of operations, so you do division first (4.2/0.7), which leaves you with 6. Then you just complete the equation from left the right as normal, which leaves you with 6.2.

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This week laptops are 25% off. If a laptop costs $340, what is its sale price?
Juli2301 [7.4K]

Answer:

$25

Step-by-step explanation:

i have an odd method of solving these types of equations

25x=100

x=4

340/4 = 85

85 x 3 = 255

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3 years ago
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What is the unit rate if there are 258 purple polka-dot pencils in 3 purple polka-dot purses?
stiks02 [169]
Unit rate means one. So the best way to solve this is using a proportion over one. If there are 258 pencils in 3 purses 258/3 then how many are in one purses x/1. Cross multiply next. 258/3 * x/1. You get 3x and 258. To get the x alone, divide both sides by three. Your answer is 86 pencils in one purse.
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3 years ago
What is the length of a side of the cube shown with given volume?
tekilochka [14]

。☆✼★ ━━━━━━━━━━━━━━━  ☾

Cube root the value:

Answer = 9 ft

If you work forward from this answer, you'll understand the process

volume = l x w x h

volume = 9 x 9 x 9

volume = 729

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。☆✼★ ━━━━━━━━━━━━━━━━  ☾

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The plsyground at a park is shaped like a trapezoid the dimensions of the playground are shiwn in the diagram
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3 years ago
Find the volume of the largest rectangular box in the first octant with three faces in the coordinate planes and one vertex in t
Tresset [83]

Answer: The volume of largest rectangular box is 4.5 units.

Step-by-step explanation:

Since we have given that

Volume = xyz

with subject to x+2y+3z=9

So, let z=\dfrac{9-x-2y}{3}

So, Volume becomes,

V=xyz\\\\V=xy(\dfrac{9-x-2y}{3})\\\\V=\dfrac{9xy-x^2y-2xy^2}{3}

Partially derivative wrt x and y we get that

9-2x-2y=0\implies 2x+2y=9\\\\and\\\\9-x-4y=0\implies x+4y=9

By solving these two equations, we get that

x=3,y=\dfrac{3}{2}

So, z=\dfrac{9-x-2y}{3}=\dfrac{9-3-3}{3}=\dfrac{3}{3}=1

So, Volume of largest rectangular box would be

xyz=3\times \dfrac{3}{2}\times 1=\dfrac{9}{2}=4.5

Hence, the volume of largest rectangular box is 4.5 units.

4 0
3 years ago
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