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Morgarella [4.7K]
2 years ago
7

Help me plz thank you

Mathematics
1 answer:
nevsk [136]2 years ago
4 0

Answer:

1) Distance=Speed*time

90=(x+1)*(x)+(2x+5)(x-1)

90=x^2+x+2x^2-2x+5x-5

3x^2+4x-95=0

2) 3x^2+4x-95=0. Using quadratic formula, we get

x=(-4±sqrt(16-4*3*(-95)<u>)</u>)/6, x=5 or - 19/5 but since x also represents time, it can't be negative.

3) Total time take she took for the journey is x+x-1=2x-1=2*5-1=9 hours

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At a hardware store, a tool set normally costs $80. During a sale this week, the tool set costs $12 less than usual. What percen
Hoochie [10]

,  15\%  of the usual price is the savings .

<u>Step-by-step explanation:</u>

Here we have , At a hardware store, a tool set normally costs $80. During a sale this week, the tool set costs $12 less than usual. We need to find What percentage of the usual price is the savings . Let's find out:

Initially we have cost as $80 , in sale it is $12 less i.e.

⇒ 80-12

⇒ 68

So , percentage of the usual price is the savings :

⇒ \frac{80-68}{80}(100)

⇒ \frac{12}{80}(100)

⇒ \frac{3(4)}{20(4)}(100)

⇒ \frac{3}{20}(100)

⇒ 3(5)

⇒ 15\%

Therefore ,  15\%  of the usual price is the savings .

8 0
3 years ago
How many possible combinations include a standard skateboard, black deck, and orange wheels? What is the probability that the ne
ankoles [38]

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There are no amount of anything that u included just the actual product

Step-by-step explanation:

4 0
3 years ago
a single box of thumb tacks weighed 3 1/2 if a teacher had 4 1/7 boxes of thumbtacks how much would their combined weight be?
lana66690 [7]
Their combined weight would be 7 2/14. here are the steps of how I got my answer.
1. I made the answers into improper fractions. 3 1/2= 7/2 and 4 1/7= 29/7.
2. then I found the least common multiple (LCM) of 2 and 7 which is 14.
3. next in order to make both denominators become 14 I cant just make 7/2 into 7/14 and 29/7 into 29/14.  so I multiplied 29/7 by 2 which got me 58/14 and 7/2 by 7 which got me 42/14.
4. then I did 42/14+ 58/14= 100/14.
5. Then the last step was to make the improper fraction 100/14 into a proper fraction. Now how do you do that? BY DIVIDING! I divided 100 by 14 and I got my answer of 7 2/14.

Hope this helped! :)
6 0
3 years ago
PLEASE HELP‼️‼️‼️thanks
prisoha [69]
Hi again, the answer is D lol. You are correct
6 0
3 years ago
Ms. Ortiz wants to arrange all of the trucks
Tems11 [23]
Okay, thxs for informing
6 0
2 years ago
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