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3 years ago

I need your help with this question

Mathematics

1 answer:

Zinaida [17]3 years ago

4 0

Step-by-step explanation:

I don't think u can solve it with the full stop or decimal in between I can solve the problem for me if u type it without decimal point

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Karina is creating two pyramids with the nets below using construction paper. In both nets, all of the triangular faces of the p

sleet_krkn [62]

Answer:

144 sq in

Step-by-step explanation:

Face height=9, bases=6 in

#Assume the pyramid has a square base.

First we need to calculate the perpendicular height of the pyramid:

$#Pythagorean \ Theorem\\a^2+b^2=c^2\\9^2-(0.5\times 6)^2=h^2\\72=h^2\\h=\sqrt{72} \ in$

Now to find the surface area of each pyramid:

$A=lw+l\sqrt{(w/2)^2+h^2}+w\sqrt{(l/w)^2+h^2}\\\\\#w=l=6,h=\sqrt{72}\\\\A=6^2+6\sqrt{(6/2)^2+72}+6\sqrt{(6/6)^2+72}\\\\A\approx 144\ sq \ in$

Hence amount of construction paper needed to make each pyramid is 144 sq in

3 0

3 years ago

Matthew bought a pair of shoes for 810 after getting a discount of 10 what is the market price of the shoe

qaws [65]

Answer:

$900

Step-by-step explanation:

If the $810 is the price after 10% discount that means

$810 is 90% of the original price

So we divide 810 / 90% or 810 / 0.9

to get $900 as final price

5 0

3 years ago

Plzz help with this question

lesantik [10]

Answer: 51 liters of fuel are required

Step by step: start by seeing how many times 476 can go into 1428

(1428/476=3)

Then take your sum of that and multiply it by 17 since that’s the number that correlates with 476

(17x3=51) therefore your answer is 51 liters

3 0

3 years ago

Please help and simplify if need be.

I am Lyosha [343]

2 3/5 divided by -1/3
13/5 • -3
-39/5
Hope this helps!

5 0

4 years ago

A 6-foot-wide hallway is painted as shown, using equal amounts of white and black paint.

Degger [83]

we know that

The hallway is painted using equal amounts of white and black paint

To know the amount of white paint------> calculate the area of white paint

$A=5x*6=30x\ ft^{2}$

To know the amount of black paint------> calculate the area of black paint

$A=(x+1)*4*6=(24+24x)\ ft^{2}$

equate the areas

$30x=(24+24x)\\30x-24x=24\\6x=24\\x=4\ ft$

Find the length of the hallway

$5x+(4x+4)=9x+4=9*4+4=40\ ft$

therefore

the answer part a) is

The hallway is $40\ ft$ long

Part b) Can this same hallway be painted with the same pattern, but using twice as much black paint as white paint?

we know that

the amount of white paint is $30x\ ft^{2}$

if the black paint is twice that the white paint

then

amount of black paint is $2*30x=60x\ ft^{2}$

amount of black paint with the same pattern is $(24+24x)\ ft^{2}$

equate

(24+24x)\ ft^{2}=(60x)\ ft^{2}

solve for the new value of x

$24x+24=60x\\ 60x-24x=24\\ x=24/36\\x= 2/3\ ft$

Find the new length of the hallway

$5x+(4x+4)=9x+4=9*(2/3)+4=10\ ft$

therefore

the answer is

Yes, the same hallway can be painted with the same pattern, using twice as much black paint as white paint, but the hallway decreases in length

5 0

4 years ago