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kolbaska11 [484]
3 years ago
15

Solve the system of equations -4x-2y=30−4x−2y=30 and -x+y=6−x+y=6 by combining the equations.elimination

Mathematics
1 answer:
oee [108]3 years ago
5 0

Answer:

215.00

Step-by-step explanation:

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Find the minimum or maximum value of the function g(x)= -(x-2)^2-3
Nady [450]
Neato

assuming you mean
g(x)=-1(x-2)^2-3
remember
in form
f(x)=a(x-h)^2+k
a is leading coficient
(h,k) is vertex
k will be the minimum or max value of the function
if a is positive, then the parabola opens up and k is minimum
if a is negative, then the parabola opens down and k is max

given
g(x)=-1(x-2)^2-3
a is negative
the parabola opens down and k is the max value
it is -3
the max value is -3, which occors at x=2
g(2)=-3 is max
3 0
3 years ago
2. How many square yards of carpet will be needed for a 21 ft by 15 ft room?
ipn [44]

Answer:

The answer to your question is: 35 yd²

Step-by-step explanation:

To solve this problem, just find the data, the formula, substitute the values in the formula and find the result.

Data

Square yards = ?

Length = 21 ft

Width = 15 ft

Formula

Area of a rectangle = length x width

Substitution

Area of a rectangle = 21 ft x 15 ft

Area of a rectangle = 315 ft²

Area of a rectangle = square yards of carpet

Finally, convert ft² to yd²

315 ft² = 35 yd²

Result

Square yards of carpet = 35 yt²

7 0
3 years ago
-x2 + x-1=0
tia_tia [17]
<span>-x^2 + x-1=0 divide by (-) </span><span><span> 
</span>
 </span><span>x^2-x+1=0 </span><span><span> 
</span>
 </span><span>x=1/2(+-) root of (1/2)^2-1 </span><span><span> 
</span>
 </span><span>x=1/2(+-) root of (1/4)-1 </span><span><span> 
</span> </span><span><span> 
</span></span><span>x=1/2(+-) root of (1/4)-1 </span>  
<span>
x=1/2(+-) root of (1/4)-((4*1)/4)  </span> 
<span>
x=1/2(+-) root of (-3/4)   
</span>
 <span>which has not answers, because we can  not take a root of negatives numbers</span>
5 0
3 years ago
Read 2 more answers
Determine the area of the rectangle below
alekssr [168]

Answer:

A=10.75

Step-by-step explanation:

Formula; A=wl

Plug in values; 2.5·4.3

Area ; 10.75

5 0
3 years ago
Read 2 more answers
The cost for renting a weed trimmer varies directly with the number of hours used. A weed trimmer rented for 5 hours costs $32.5
wlad13 [49]
Let the cost for renting be y and the number of hours be x
then:
y=kx
where:
k is the constant of proportionality
k=y/x
y=$32.5 when x=5 hours
thus;
k=32.5/5
k=6.5
hence the equation is:
y=6.5x
thus the value of y when x=8 hours will be:
y=6.5(8)=$52
Answer:'

<span>A y = $6.5x, y = $52.00</span>
4 0
3 years ago
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