Graph y= 1/2x–3. please help

Answer:

1. Putting  x = 0.5, y = -1/10 gives  0.44

2. Putting  x = -1, y = -3  gives 14

3. Putting x =3/4 , y = 2/5 gives 1.665

4. Putting  x = 0, y = 2.5 gives - 11.25

5.  Putting x = √2, y = √2 gives 17

6. Putting x = 2, y = -1  gives - 1

Step-by-step explanation:

-3x2 + 2y2 + 5xy - 2y + 5x2 - 3y2

1. Putting  x = 0.5, y = -1/10

-3(0.5)^2 + 2(-1/10)^2 + 5(-0.05) - 2(-1/10) + 5(0.5)^2 - 3(-1/10)^2

= -0.75 +0.02 - 0.25 +0.2 + 1.25- 0.03

= 0.44

2. Putting  x = -1, y = -3

-3(-1)^2 + 2(-3)^2 + 5(3) - 2(-3) + 5(-1)^2 - 3(-3)^2

= -3 +18 +15+6+5-27

= 14

3. Putting x =3/4 , y = 2/5

-3(3/4)^2 + 2(2/5)^2 + 5(6/20) - 2(2/5) + 5(3/4)^2 - 3(2/5)^2

=- 27/16 +8/25 +30/20 -4/5 +45/16 - 12/25

= 18/16 - 24/25 + 30/20

= 18/16 - 96+150/100

= 18/16 +54/100

= 1800+ 864/1600

= 2664/1600

=1.665

4. Putting  x = 0, y = 2.5

-3(0)^2 + 2(2.5)^2 + 5(0) - 2(2.5) + 5(0)^2 - 3(2.5)^2

= 12.5 - 5.0 - 18.75

= -11.25

5.  Putting x = √2, y = √2

-3(√2)^2 + 2(√2)^2 + 5(√2.√2) - 2(√2) + 5(√2)^2 - 3(√2)^2

= -6 +4+10-4+19-6

= 17

6. Putting x = 2, y = -1

-3(2)^2 + 2(-1)^2 + 5(-2) - 2(-1) + 5(2)^2 - 3(-1)^2

= -12+2 -10 +2 +20 -3

= -1

Answer:

so whats the question??

Step-by-step explanation:

Answer:

I dont understand there is no equation to solve or any math at all

Answer:

8736

Step-by-step explanation:

Answer:

8,736

Step-by-step explanation:

728 x 12 = 8,736

Answer:

232 text messages

Step-by-step explanation:

108 - 50 = 58

[tex]58 \div .25[/tex]

232 text messages

Yw :)

Answer:

4.25

Step-by-step explanation:

-x^2 + 3x + 2 = 0

Divide by -1

X^2 -3x - 2 = 0

x^2-3x+ =2+2.25

(x-1.25)-4.25

(x-1.5)

Answer:

12,5 centimeters.

Step-by-step explanation:

We take the following proportion

[tex]\frac{1 cm}{80m} = \frac{x}{1000m}[/tex]

Which becomes:

[tex]1000 = 80x[/tex]

And then, we clear out the variable x:

[tex]\frac{1000}{80}=\frac{100}{8}=\frac{50}{4}=12,5[/tex]

And this means that the width of the lake on the scale drawing will be 12.5 cm.

Answer:

The toy rocket will return to the ground at 8.44 seconds

Step-by-step explanation:

The height h of the toy rocket launched vertically as a function of the time t is given by:

[tex]h(t)=-16t^2+135t[/tex]

The rocket will return to the ground when h=0:

[tex]-16t^2+135t=0[/tex]

Factoring:

[tex]t(-16t+135)=0[/tex]

There are two solutions:

t=0, t = 135/16 = 8.4375

The first solution corresponds to the moment the toy rocket was launched, the second is the time taken by the rocket to return to the ground.

The toy rocket will return to the ground at 8.44 seconds

Answer: pick b

Step-by-step explanation:

Answer:

Step 2 and 3

Step-by-step explanation:

:)

Answer:

= 2.24 × 10^9

Step-by-step explanation:

= 2.24 × 10^9

(scientific notation)

= 2.24e9

(scientific e notation)

= 2.24 × 10^9

(engineering notation)

(billion; prefix giga- (G))

= 2240000000

(real number)

Answer:

The required expression for the depth is [tex]5.5t[/tex] feet.

The depth after 1.3 minutes is 71.5 feet.

Step-by-step explanation:

Let d be the depth of the sea below the surface of the water.

The rate of descending or the rate of increasing the depth, [tex]r= 5.5[/tex] feet/min.

Since, the rate is constant, so,

If the diver reaches the depth, [tex]d[/tex], in time, [tex]t[/tex]. So,

[tex]r= d/t[/tex]

[tex]\Rightarrow d=r\times t[/tex]

So, for [tex]r=5.5[/tex] feet/min, the required expression for the depth is [tex]5.5t[/tex] feet.

After time t= 1.3 minutes.

The depth, [tex]d = 5.5 \times 1.3 = 71.5[/tex] feet.

Answer:

The correct answer is x =55°

Answer:

17 years

Step-by-step explanation:

hope it helps:)

Answer:

20 Years.

Step-by-step explanation:

As you could see my friend owned a dog for 9 years, and it reads that it is one year less which is 10 years since 10-1 (aka one year) equals 9 so anyways we know it's 10, and it's twice as long 10 x 2 (aka twice). which is how I got my answer... 20!  

Answer:

what grade you in

this looks like 4th grade

Answer:

8 degrees

Step-by-step explanation:

Mark me the brainliest and rate me please

Answer:

8°

Step-by-step explanation:

Answer:

No, the administrator is wrong.

[tex]Adult = 500[/tex]

Step-by-step explanation:

Given

[tex]Total = 931[/tex]

[tex]Children = 423[/tex]

[tex]Adult = 408[/tex]

Solving (a): Is the administrator correct?

No, the administrator is wrong.

This is so because: when the number of children is subtracted from the total patient, the remaining number is not 408

Solving (b): Estimate the number of adults

By rounding up:

[tex]Adult = Total - Children[/tex]

Actual Figures

[tex]Adult = 931 - 423[/tex]

Round up

[tex]Adult = 900 - 400[/tex]

[tex]Adult = 500[/tex] -- approximately

Answer:

No

Step-by-step explanation:

Answer: Yes, but can you look on my page and answer the questions ??

Step-by-step explanation:

Answer:

In an equilateral triangle, all three sides are the same length. An equilateral triangle is always equiangular. In an isosceles triangle, two sides are the same length. An isosceles triangle may be right, obtuse, or acute.

Step-by-step explanation:

Answer:

500

Step-by-step explanation:

1=50 and 50 x 10 = 500

An expression is defined as a set of numbers, variables, and mathematical operations. The expressions that are equivalent to the given expression is -3+2i - 2(24) - 8i and -51 - 6i.

In mathematics, an expression is defined as a set of numbers, variables, and mathematical operations formed according to rules dependent on the context.

The given expression can be simplified as,

(-√9 + √-4) - (2√576 + √-64)

= (-3+2i) - 2(24) - 8i

= -3+2i - 2(24) - 8i

= -3 + 2i - 42 - 8i

= -51 - 6i

Hence, the expressions that are equivalent to the given expression is -3+2i - 2(24) - 8i and -51 - 6i.

Learn more about Expression:

https://brainly.com/question/13947055

#SPJ2

Answer:

0.00024

Step-by-step explanation:

= 2.4 × 10-4

(scientific notation)

= 2.4e-4

(scientific e notation)

= 240 × 10-6

(engineering notation)

(millionth; prefix micro- (u))

= 0.00024

(real number)

The area is 9 sq. units

Answer:

9 sq units

Step-by-step explanation:

triangle formula is 1/2B*H