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4 years ago

Is (-5,-5) a solution of y> - 2x + 4?

Mathematics

2 answers:

valina [46]4 years ago

6 0

Answer:

Step-by-step explanation:

Let's check by substituting -5 for y and -5 for x:

y > -2x + 4

-5 > -2 * (-5) + 4

-5 > 10 + 4

-5 > 14

However, we know that -5 is definitely not greater than 4, so we know that (-5, -5) is NOT a solution to the given inequality.

Hope this helps!

bekas [8.4K]4 years ago

4 0

Answer:

Step-by-step explanation:

Let's check by substituting -5 for y and -5 for x:

y > -2x + 4

-5 > -2 * (-5) + 4

-5 > 10 + 4

-5 > 14

Step-by-step explanation:

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What is 10t =90 and how do I solve this?please help

Nesterboy [21]

To solve this you have to divide 90 by 10 which would be 9 so

t=9

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4 years ago

the shake shack sells large and small shakes.a large shake cost $5 , and a small shake cost $3. On sunday,the shake shack had a

puteri [66]

While x is the number of small shakes and y is the number of large shakes each size shake you by needs to be multiplied by the cost .... D: 3x+5y=479

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3 years ago

Read 2 more answers

a farmer is planning a rectangular area for her chickens. the area of the rectangle will be 200 square feet. three sides of the

Vladimir79 [104]

Let

x---------> the length side of the rectangular area

y---------> the width side of the rectangular area

we know that

the area of the rectangle is equal to

$A=x*y\\ A= 200\ ft^{2} \\ x*y=200$

$y=\frac{200}{x}$ -----> equation $1$

The perimeter of the rectangle is equal to

$P=2x+2y$

but remember that the fourth side of the rectangle will be formed by a portion of the barn wall

$P=x+2y$ -----> equation $2$

To minimize the cost we must minimize the perimeter

Substitute the equation $1$ in the equation $2$

$P=x+2*[\frac{200}{x} ]$

Using a graph tool

see the attached figure

The minimum of the graph is the point $(20,40)$

that means for $x=20\ ft$

the perimeter is a minimum and equal to $40\ ft$

Find the value of y

$y=\frac{200}{x}$

$y=\frac{200}{20}$

$y=10\ ft$

The cost of fencing is equal to

$5*40= \$200$

therefore

the answer is

the length side of the the fourth wall will be $20\ ft$

7 0

4 years ago

Write the value of b when the expression 14.1x + b is equivalent to 4.7(3x – 5).

katovenus [111]

Answer:

b = -23.5

Step-by-step explanation:

4.7(3x - 5) = 14.1x - 23.5

6 0

3 years ago

Write the equation of the quadratic given the following information:

xenn [34]

y=a((x-h)^2)+k
Vertex=(h,k)
1. Vertex (5,-1) Point (2,4)
y=a((x-5)^2)+(-1)
f(2)=4
4=a((2-5)^2)+(-1)
4=a(-3)^2-1
4=a*9-1
5=a*9
5/9=a
y=(5/9)((x-5)^2)-1
2. Vertex (-2,0) Point (-1,-7)
y=a((x+2)^2)+0
y=a((x+2)^2)
f(-1)=-7
-7=a(-1+2)^2
-7=a(1)^2
a=-7
y=-7(x+2)
(x-h)^2=4(d)(y-k)
3. Vertex (0,0) Focus (0,2)
d=f-v
d=2
(x^2)=4(2)(y)
(x^2)=8y
f(0)=0
4. Focus (-3,4) Directrix y= -2
(x-h)^2=4(d)(y-k)
d=(4-(-2))/2=6/2=3
(x-h)^2=4(3)(y-k)
h=-3
k=(-2+4)/2=(2)/2=1
(x+3)^2=4(3)(y-1)
(x+3)^2=12(y-1)

6 0

4 years ago