Ask question

Ask question

All categories

3 years ago

9

f the points (-4, 1) and (2, 1) are the endpoints of a diameter of a circle, where is the center? A) (-7, 1) B) (-1, 1) C) (1, -

1) D) (5, 1)

1 answer:

Ulleksa [173]3 years ago

4 0

Answer:

B

Step-by-step explanation:

The centre is at the midpoint of the endpoints of the diameter.

Using the midpoint formula, then

centre = ( $\frac{-4+2}{2}$ , $\frac{1+1}{2}$ ) = (- 1, 1 ) → B

You might be interested in

What is 1.43 as a mixed number

denpristay [2]

143 over 100 Would be an examaple of a mixed number would just fine.

8 0

3 years ago

Read 2 more answers

What is the answer 3 3/4 - 2 5/6=

Rom4ik [11]

Answer:

11/12

Step-by-step explanation:

3 3/4 - 2 5/6

Convert to improper fractions

15/4 - 17/6

Find a common denominator (12)

45/12 - 34/12

Subtract

11/12

Hope this helps :)

7 0

3 years ago

Read 2 more answers

If a=8 and b=4, evaluate the following expression:3a+b

hodyreva [135]

3(8) + 4

= 24 + 4

= 28

basically

7 0

2 years ago

Read 2 more answers

Jasmine is planning on buying a pair of khaki pants.

spayn [35]

Answer:

$19.79

Step-by-step explanation:

<em>I legit just helped someone with this same question XD..</em>

10% discount is $2.

Subtract.

You get 17.99.

10% sales tax is $1.80.

Add.

You get $19.79.

5 0

3 years ago

Can anyone help me with these questions plz

KonstantinChe [14]

Answers:

7: 20 miles

8: 28 miles

9: 1 error

10: Their speed is 50

11: 365 words in 5 mins

Step-by-step explanation:

#7 and #8

Our equation is: $f=2.25+0.20(m-1)$ With f meaning "fare" (price) and m meaning "miles".

Question 7 - Juan's fare for his ride costs $6.05. We must solve for $m$ .

Step 1. Substitute - <em>Substitute the fare for $f$ in the equation.</em>

$6.05=2.25+0.20(m-1)$

Step 2. Simplify/Solve - Solve for $m$ .

$6.05=2.25+0.20(m-1)$

<em>- Distribute</em>

$6.05=2.25+0.2m-0.2$

<em>- Subtract 0.2 from 2.25</em>

$6.05=2.05+0.2m$

<em>- Subtract -2.05 from 6.05</em>

$4=0.2m$

<em>- Divide both sides by 0.2</em>

$20=m$

<u>And you have your answer of 20 miles.</u>

Question 8 - Same equation, different fare.

Step 1. Substitute

$7.65=2.25+0.20(m-1)$

Step 2. Solve

$7.65=2.25+0.20(m-1)\\7.65=2.25+0.20m-0.20\\7.65=2.05+0.20m\\5.6=0.20m\\28=m$

And like so, we have $m = 28$

Questions 9 - 11

<em>The equation given is $S=\frac{1}{5} (w-10e)$ . S = typing speed, w = words per 5 mins, and e= errors.</em>

Question 9 -

<em>We are given this information: S = 55, W = 285. We are solving for e</em>.

Substitute -

$55=\frac{1}{5} (285 -10e)$

Solve -

$55=\frac{1}{5} (285 -10e)\\55=\frac{1}{5} (285 -10e)\\55= 57-2e\\-2=-2e\\1=e$

So they would make 1 error.

Question 10 -

<em>Information given: 300 = w, 5=e. We are solving for S</em>

Substitute -

$S= \frac{1}{5} (300-10(5))$

Solve -

$S= \frac{1}{5} (300-10(5))\\S= \frac{1}{5} (300-50)\\S= \frac{1}{5} (300-50)\\S= \frac{1}{5} (250)\\S= 50$

Their speed is 50.

Question 11 -

<em>Information given: S = 65, e = 4. We are solving for w.</em>

Substitute -

$65=\frac{1}{5} (w-10(4))$

Solve -

$65=\frac{1}{5} (w-10(4))\\65=\frac{1}{5} (w-40)\\65=\frac{1}{5}w-8\\73=\frac{1}{5}w\\365=w$

So w = 365.

Hoped this helped!~

7 0

3 years ago