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Lelu [443]
3 years ago
11

-2x+5y-3z=8 2x-3y+4x=-3 2x-2y+2z=2

Mathematics
1 answer:
svet-max [94.6K]3 years ago
3 0

Answer:

2x-3y+4x=-3

Step-by-step explanation:


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Ill answer it for you 150 cubic meters
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3 years ago
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Simplify the expression 2√ 20 − 3√ 7 − 2√ 5 + 4√ 63 .
earnstyle [38]

Answer:

The simplified form is,

\boxed{\boxed{6\sqrt{5}+9\sqrt{7}}}

Step-by-step explanation:

The given expression is,

=2\sqrt{20}-3\sqrt{7}+2\sqrt{5}+4\sqrt{63}

=2\sqrt{4\times 5}-3\sqrt{7}+2\sqrt{5}+4\sqrt{9\times 7}

=2(\sqrt{4}\times \sqrt{5})-3\sqrt{7}+2\sqrt{5}+4(\sqrt{9}\times \sqrt{7})

=2(2\times \sqrt{5})-3\sqrt{7}+2\sqrt{5}+4(3\times \sqrt{7})

=4\sqrt{5}-3\sqrt{7}+2\sqrt{5}+12\sqrt{7}

=4\sqrt{5}+2\sqrt{5}+12\sqrt{7}-3\sqrt{7}

=6\sqrt{5}+9\sqrt{7}

8 0
4 years ago
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Stan on a bike ride. His GPS indicates that he is travel exactly 18 miles and he is 32% complete with his total ride. How many m
Afina-wow [57]
X-miles of stance ride
32%x=18
(32/100)*x=18
(32x)/100=18
32x=1800
x=56.25 miles 
3 0
3 years ago
He statement below describes a situation in which opposite quantities combine to make zero:
kozerog [31]
False I’m pretty sure
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3 years ago
O is the centre of the circle, EF is a tangent, angle BCE=28 degrees, angle ACD=31 degrees.
Yuki888 [10]

Answer:

a. 28˚

b. 76˚

c. 104˚

d. 56˚

Step-by-step explanation

a. because angle between tangent and chord is equal to the angle(s) in alternate segment.

b. because angles in triangles add up to 180˚, 180-28=152 and because isosceles triangle, 152/2=76˚

c. because angles in triangles add up to 180˚ and opposite angles in a cyclic quadrilateral add up to 180˚, 31+76=107, 180-107=73, 73-28=45, angles in triangle so 180-(31+45)=104˚

d. 28*2=56˚ because angles at circumference are half angles at centre

4 0
3 years ago
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