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Finger [1]
3 years ago
13

NEED HELP Solve using elimination. –8x − 4y = –20 8x + 5y = 13

Mathematics
1 answer:
STatiana [176]3 years ago
4 0

Answer:

X=6 and y=-7

Step-by-step explanation:

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A trough is 12 ft long and its ends have the shape of isosceles triangles that are 3 ft across at the top and have a height of 1
V125BC [204]

Answer:

\frac{dh}{dt}=0.5ft

Step-by-step explanation:

From the question we are told that:

Length l=12

Top length l_t=3ft

Height h=1ft

Rate R=14 ft3/min

Water rise w=4

Generally the equation for Velocity is mathematically given by

V=frac{1}{2}wh'(l)\\\\V=frac{1}{2}wh'(12)

V=18h'^2

Therefore

R=18(2h)(\frac{dh}{dt})

Where

h=\frac{3}{4}

Therefore

\frac{dh}{dt}=\frac{R}{18(2h)}

\frac{dh}{dt}=\frac{14}{18(2.3/4)}

\frac{dh}{dt}=0.5ft

8 0
3 years ago
ANSWER ASAP!!!!!!!! I'LL GIVE YOU BRAINLIEST!!!!!!!!!! 10x-8=2x+6
zaharov [31]

Answer:

x= 1.75

Step-by-step explanation:

I uhm *whispers* used mat hway

4 0
3 years ago
Read 2 more answers
Which of the following is the correct expansion of (3x-y)2
Studentka2010 [4]

\bold{[ \ Answer \ ]}

\boxed{\bold{9x^{2} \ - \ 6xy \ + y^{2} }}

\bold{[ \ Explanation \ ]}

  • \bold{Find \ Expansion: \ (3x \ - \ y^{2} )}

\bold{----------------------}

  • \bold{[Apply \ Perfect \ Square \ Formula\ (\left(a-b\right)^2=a^2-2ab+b^2)] \ a \ = \ 3x, \ b \ = \ y}

\bold{\left(3x\right)^2-2\cdot \:3xy+y^2}

  • \bold{[Simplify \ \left(3x\right)^2-2\cdot \:3xy+y^2] \ 9x^2-6xy+y^2}

= \bold{9x^2-6xy+y^2}

\boxed{\bold{[] \ Eclipsed \ []}}

3 0
3 years ago
Difference of numbers. The larger of two integers is 8 less than twice the smaller. When the smaller number is subtracted from t
julsineya [31]
Let's call the numbers x (the bigger) and y (the smaller)

The larger of two integers is 8 less than twice the smaller. this means:

x=2z-8
When the smaller number is subtracted from the larger, the difference <span> is 17.

This means: x-z=17.


i'll insert </span>
2z-8

instead of x, since it's equal to it: 
2z-8-z=17

2z-z is just z:
z-8=17

so

z=25.
and x must be 25+17=42

let's check:The larger of two integers is 8 less than twice the smaller.
twice the smaller is 50, and yes, 42 is 8 smaller than 50, it's correct!

so the two numbers are 25 and 42



8 0
3 years ago
Pls help me its due in 10 minutes!
zhannawk [14.2K]

Answer:

7 hours

Step-by-step explanation:

3 0
2 years ago
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