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3 years ago

Show that x = -5 is a solution to the inequality 18x – 42 ≠7x

Mathematics

1 answer:

vodka [1.7K]3 years ago

6 0

Answer:

It works.

Step-by-step explanation:

11x≠42

So 42/11 is not a viable solution for x. All other real numbers work, so x=-5 is a solution.

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Solve the inequality 7x<5x-8

Aleksandr [31]

Minust 5x both sides
7x-5x<5x-5x-8
2x<-8
divide by 2 both sides
x<-4

6 0

3 years ago

10 ft р area = 170 ft

SVEN [57.7K]

Answer:

170 square feet

Step-by-step explanation:

3 0

3 years ago

the human eyeball is a sphere with a surface area of 20 square cm. find the approximate radius of the human eyeball.

guapka [62]

Answer:

1.26 corect answer

Step-by-step explanation:

the surface area of a sphere is 4*pi*r^2

so r is sqrt(20/pi) which is sqrt(1.59) = 1.26

4 0

4 years ago

The midpoint of RS is M(1, 2). One endpoint is R(-6, 6). Find the coordinates of endpoint S.

AysviL [449]

Answer:

The coordinates of point S are (8,-2)

Step-by-step explanation:

we know that

The formula to calculate the midpoint between two points is equal to

$M=(\frac{x1+x2}{2},\frac{y1+y2}{2})$

Let

Point S(x2,y2)

substitute the given values

$(1,2)=(\frac{-6+x2}{2},\frac{6+y2}{2})$

Solve for x2

$1=(-6+x2)/2\\2=-6+x2\\x2=2+6=8$

Solve for y2

$2=(6+y2)/2\\4=6+y2\\y2=4-6=-2$

therefore

The coordinates of point S are (8,-2)

5 0

3 years ago

Can someone help me plz

ankoles [38]

The answer should be 4. Take note of the pattern of unit digits of 2^n.

2^1 = 2
2^2 = 4
2^3 = 8
2^4 = 16
2^5 = 32

Every 4 powers, it rotates 2, 8, 6, 4. Since 2020 is divisible by 4, the answer is 4.

8 0

3 years ago