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Tems11 [23]
3 years ago
9

Write a compound inequality that represents the situation. All real numbers at least -6 and at most 3.

Mathematics
2 answers:
Nikolay [14]3 years ago
4 0
All real numbers at least - 6 and at most 3:
- 6 ≤ x ≤ 3
Thank you.
nydimaria [60]3 years ago
3 0

Answer: Compound inequality will be

-6\leq x\leq 3

Step-by-step explanation:

Since we have given that

All real numbers at least -6

Let the number be x

So, According to question, it will be

x\geq -6

Now, all real numbers at most 3

So, it will be

x\leq 3

so, Compound inequality will be

-6\leq x\leq 3

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Solve the equation. Check for extraneous solutions.
Sliva [168]
Assume
if |a|=b
a=b and -a=b

so

9|9-8x|=2x+3
divide both sides by 9
|9-8x|=2/9x+1/3
assume
9-8x=2/9x+1/3 and
-9+8x=2/9x+1/3


9-8x=2/9x+1/3
times 9 both sides
81-72x=2x+3
add 72x both sides
81=74x+3
minus 3
78=74x
divide both sides by 74
39/37=x

other one
-9+8x=2/9x+1/3
multiply both sides by 9
-81+72x=2x+3
minus 2x both sides
-81+70x=3
add 81 to both sides
70x=84
divide boh sides by 70
x=6/5


x=39/37 and 6/5
check

9|9-8(39/37)|=2(39/37)+3
2646/37=189/37
false

9|9-8(6/5)|=2(6/5)+3
351/5=27/5
false

no soltion evidently, weird

3 0
3 years ago
How many pounds of candy that sells for ​$0.82 per lb must be mixed with candy that sells for ​$1.36 per lb to obtain 9 lb of a
Lady_Fox [76]

7.5 pounds of the $0.82 per lb candy must be used in the mixture.

<h3>How many pounds of each candy should we use?</h3>

First, let's define the variables:

  • x = pounds of the $0.82 candy used.
  • y = pounds of the $1.36 candy used.

We want to make 9 lb of mixture, then:

x + y = 9.

And the price of these 9 pounds must be $0.91, then we can write:

x*$0.82 + y*$1.36 = 9*$0.91 = $8.19

Then we have a system of equations:

x + y = 9.

x*$0.82 + y*$1.36 = $8.19

We can isolate y on the first equation so we get:

y = 9 - x

Now we can replace that on the other equation:

x*$0.82 + (9 - x)*$1.36 = $8.19

And now we can solve this for x.

x*($0.82 - $1.36) = $8.19 - 9*$1.36

-x*$0.54 = -$4.05

x = (4.05/0.54) = 7.5

So 7.5 pounds of the $0.82 per lb candy must be used in the mixture.

If you want to learn more about systems of equations:

brainly.com/question/13729904

#SPJ1

4 0
2 years ago
A rectangle has length 72 cm and width 56 cm. The other rectangle has the same area as this one, but its width is 21 cm. What is
katovenus [111]

Answer:

The constant of variation is 4032

Step-by-step explanation:

Given:  

Let a rectangle (say A) has length of rectangle(l)= 72 cm and width of rectangle(w) = 56 cm.

Area of rectangle is multiply its length by its width.

Then,

area of rectangle (A) =l \times w = 72 \times 56 = 4,032 square cm.

It is given that the other rectangle B has the same area as the rectangle A.

Then, the area of rectangle (B) = area of rectangle (A) = 4,032 square cm.  .......[1]

First find the length of rectangle B:

Given: width of the rectangle B is 21 cm

then, by definition

Area of rectangle B = l \times w = l \times 21

From [1];

4032 = l \times 21

Divide 21 both sides we get;

l =\frac{4032}{21} = 192 cm

therefore, the length of rectangle B is 192 cm

To find the constant variation:

if y varies inversely as x

i.e, y \propto \frac{1}{x}

⇒ y = \frac{k}{x} where k is the constant variation.

or k = xy

As area of rectangle is multiply its length by width.

This is the inversely variation.

as: l \propto \frac{1}{w}

or l = \frac{A}{w} where A is the constant of variation

Since, the area (A) of both the rectangles are constant.

therefore, the constant of variation is, 4032


5 0
4 years ago
Simplify the expression. <br><br> 2√5 · √19
dusya [7]

Answer:

Step-by-step explanation:

ggh

6 0
4 years ago
Can someone help will give brainlist
Marizza181 [45]

Answer:

720

Step-by-step explanation:

10x9x8

Since they are picking 3 different instruments

please mark me brainliest :)

5 0
3 years ago
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