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2 years ago

Help me plz, 13 points! these questions are separate. help me work out both questions please

Mathematics

1 answer:

Taya2010 [7]2 years ago

8 0

2x+20 makes more sense to the math question

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For your summer babysitting jobs you have 10 weeks to work before your family vacation and before you return to school in the fa

seropon [69]

Uh ummm the question?

5 0

3 years ago

A. ASA Postulate B. HL Theorem C.AAS Theorem D. SAS Postulate

TiliK225 [7]

Answer:

your answer will be B. HL Theorem 

Step-by-step explanation:

hope it helps you...

4 0

2 years ago

Can anyone answer this question please 6[y-2]/7-12=2[y-7]/3

Kaylis [27]

Answer:

y =47.5.

Step-by-step explanation:

First eliminate the fractions by multiplying through by the LCM of 7 and 3 which is 21:

21* 6[y-2]/7-21*12 = 21*2[y-7]/3

18(y - 2) - 252 = 14(y - 7)

18y -36 - 252 = 14y - 98

18y - 14y = -98 + 36 + 252

4y = 190

y = 190/4

y = 47.5.

8 0

1 year ago

Dwayne drove 18 miles to the airport to pick up his father and then returned home. On the return trip he was able to drive an av

Nesterboy [21]

Answer:

30 mph

Step-by-step explanation:

Let d = distance (in miles)

Let t = time (in hours)

Let v = average speed driving to the airport (in mph)

⇒ v + 15 = average speed driving from the airport (in mph)

Using: distance = speed x time

$\implies t=\dfrac{d}{v}$

Create two equations for the journey to and from the airport, given that the distance one way is 18 miles:

$\implies t=\dfrac{18}{v} \ \ \textsf{and} \ \ t=\dfrac{18}{v+15}$

We are told that the total driving time is 1 hour, so the sum of these expressions equals 1 hour:

$\implies \dfrac{18}{v} +\dfrac{18}{v+15}=1$

Now all we have to do is solve the equation for v:

$\implies \dfrac{18(v+15)}{v(v+15)} +\dfrac{18v}{v(v+15)}=1$

$\implies \dfrac{18(v+15)+18v}{v(v+15)}=1$

$\implies 18(v+15)+18v=v(v+15)$

$\implies 18v+270+18v=v^2+15v$

$\implies v^2-21v-270=0$

$\implies (v-30)(v+9)=0$

$\implies v=30, v=-9$

As v is positive, v = 30 only

So the average speed driving to the airport was 30 mph

(and the average speed driving from the airport was 45 mph)

8 0

1 year ago

Read 2 more answers

It costs $2.75 to enter an arcade. Each game costs $1.25. You have $14. How many games can you play?

Greeley [361]

Answer:

9 times

Step-by-step explanation:

first you do 14 - 2.75 which equals 11.25. you divide that number by 1.25 which equals 9 in total, getting you your answer

7 0

2 years ago

Read 2 more answers

Help me plz, 13 points! these questions are separate. help me work out both questions please ​

Help me plz, 13 points! these questions are separate. help me work out both questions please