Which set of numbers represents the domain for the following table below

Write a proportion to find how many points xx a student needs to score on a test worth 80 points to get a test score of 80%.

Ugo [173]

Xx/80 = 80/100 . . . . . . . . . your proportion

8 0

3 years ago

Read 2 more answers

The distance between two cities is 87 km. What is the distance between them on a map drawn at a scale of 1:600,000?

Elena L [17]

The distance between them on a map at a scale 1 : 600,000 is 14.5 cm

Step-by-step explanation:

Scale drawing:

Is used to represent a real object with accurate sizes reduced or enlarged by a certain amount (called the scale)
States the ratio of a length in the drawing to an equivalent length in the real world
1 : 100 means 1 unit in drawing represents 100 units in real life

∵ The distance between two cities is 87 km

∵ The distance between them on a map drawn at a scale of

1 : 600,000

- That means each 1 cm represents in real life 600,000 cm, so

you must change the kilometer to centimeter

∵ 1 km = 100,000 cm

∴ 87 km = 87 × 100,000 = 8,700,000 cm

Now let us use the ratio method

→ 1 : 600,000

→ x : 8,700,000

By using cross multiplication

∴ x × 600,000 = 1 × 8,700,000

- Divide both sides by 600,000

∴ x = 14.5

∴ The distance between them on the map = 14.5 cm

The distance between them on a map at a scale 1 : 600,000 is 14.5 cm

Learn more:

You can learn more about the scale drawing in brainly.com/question/570757

#LearnwithBrainly

8 0

3 years ago

Djfbdodkckrejfbdjdjd

xxTIMURxx [149]

Answer:

--15

Step-by-step explanation:

First do the bracket

anything inside () and squared (or even numbers) will become positive

so 1- (16)

1-16=-15

6 0

3 years ago

What is the solution of the system. Use the substution method. 3x+2y=11, x-2=-4y

liq [111]

Answer:

$x=\frac{10}{3}$ and $y=\frac{1}{2}$

Step-by-step explanation:

To use the substitution method, we should take one of the equations, and obtain an expression for one of the variables from this equation. Let's take the first one: 3x-2y = 11. We obtain an expression for x (it could be for y as well): 3x = 11 + 2 y ⇒ $x=\frac{11}{3}+\frac{2}{3} \times{y}$ .
Now, we should replace the expression obtain for x in the first equation, on the second equation, as follow

$x-2=4y$ ⇒ $(\frac{11}{3}+\frac{2}{3}\times{y})-2=4\times{y}$
Then rearranging terms $\frac{11}{3}-2=4\times{y}-\frac{2}{3}\times{y}$
This expression results in $y=\frac{1}{2}$
Finally, using the firs equation, in which we obtained an expression from x, $x=\frac{11}{3}-\frac{2}{3} \times{y}$ , we replace y=1/2 and get $x=\frac{11}{3}- \frac{2}{3}\times{\frac{1}{2} }$ , then $x=\frac{10}{3}$

3 0

3 years ago

At the beginning of the school year, the 7th grade class at Oak Hill Middle School has 480 students. There are 270 girls and 210

Dimas [21]

Answer:

Part 1: 43.75%

Part 2: 44.07%

Step-by-step explanation:

Hello!

(Pt.1) First, set up a ratio $210/480$ . Next, you use long division I got the percent 43.75. After that, you subtract 6 from the girls group, (because of them moving away and then more coming back.) and 2 from the boys group. Then, you subtract those from the school "population" and you get 472 as the final population. So then you set up another ratio, $208/472$ . I got a percent of 44.07% from that.

Thanks For Reading!

7 0

2 years ago