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4 years ago

What is a 3D shape that has 3 rectangular sides and 2 triangular sides ?

Mathematics

2 answers:

grigory [225]4 years ago

5 0

The answer is a triangular prism.

Elan Coil [88]4 years ago

3 0

Triangular Prism. It has 3 rectangular faces and 2 triangular bases

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Find the slope of a line perpendicular to each given line

andre [41]

$k:\ y=m_1x+b_1\\l:\ y=m_2x+b_2\\\\l\ \perp\ k\iff m_1m_2=-1\to m_2=-\dfrac{1}{m_1}$

$115)\ -x-y=3\ \ \ |+x\\-y=x+3\ \ \ |\cdot(_1)\\y=-x-3\to m_1=-1\to\boxed{m_2=-\dfrac{1}{-1}=1}\\\\116)\ 0=-4x-y+5\ \ \ |+y\\y=-4x+5\to m_1=-4\to\boxed{m_2=-\dfrac{1}{-4}=\dfrac{1}{4}}\\\\117)\ 6-2y=x\ \ \ \ |-6\\-2y=x-6\ \ \ \ |:(-2)\\y=-\dfrac{1}{2}x+3\to m_1=-\dfrac{1}{2}\to\boxed{m_2=-\dfrac{1}{-\frac{1}{2}}=2}\\\\118)\ 5y=25+4x\ \ \ \ |:5\\y=5+\dfrac{4}{5}x\to m_1=\dfrac{4}{5}\to\boxed{m_2=-\dfrac{1}{\frac{4}{5}}=-\dfrac{5}{4}}$

$119)\ -15x-9y=9\ \ \ \ |+15x\\-9y=15x+9\ \ \ \ |:(-9)\\y=-\dfrac{15}{9}x-1\\y=-\dfrac{5}{3}x-1\to m_1=-\dfrac{5}{3}\to\boxed{m_2=-\dfrac{1}{-\frac{5}{3}}=\dfrac{3}{5}}$

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3 years ago

4 loads of stone weigh 2/3 ton. Find the weight of 1 load of stone.

Vladimir79 [104]

To find the weight of 1 load of stone, divide 2/3 by 4.

To divide fractions, use keep change flip.

Keep the first fraction the same, change the division sign into a multiplication sign, and flip the second fraction.

I attached the work and answer for this problem. If you have any questions please feel free to ask.

Hope this helps.

7 0

4 years ago

What is the value of the expression? 18 - 2 x (4 + 3)

Arturiano [62]

Answer:

=−14x+18

Step-by-step explanation:

happy to help ya :)

7 0

3 years ago

Read 2 more answers

Need some help with math work

dem82 [27]

Answer: (4x^2−12x+9)-4

this should work

Step-by-step explanation:

5 0

3 years ago

If y varies inversely as x and y is 2.5 when x is 6, what is y when x is 4?

Lady_Fox [76]

Yvaries as x means
y=kx where k is constant
y=2.5
x=6
find k
2.5=k6
divide bot sides by 6
2.5/6=k (leave as that an simplfy later)

if x=4, what is y
y=(2.5/6)*4
y=10/6
y=5/3
y=1 and 2/3

5 0

3 years ago