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cricket20 [7]
3 years ago
12

Show why 4y + 6 < 38 and -3x - 6 > 18 are considered equivalent inequalities

Mathematics
1 answer:
inessss [21]3 years ago
4 0

Answer:

undefenide+

Step-by-step explanation:

0e46.38 times 6.1 = undefenide+

I hope thishelped your question and have a big A +

byeee✍✍✍

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Jean runs 8 mi and then rides 11 mi on her bicycle on a biathlon. She rides 9 mph faster than she runs. If the total time for he
Ipatiy [6.2K]

Let Jean's speed while running = x mph

Then Jean's speed while riding will be = x+9 mph

Distance covered by running = 8 miles

Distance covered by riding = 11 miles

Total time taken to complete the race = 1.5 hours

As, time=\frac{distance}{speed}

So, time for running= \frac{8}{x}

And time for riding= \frac{11}{x+9}

Equation becomes:

\frac{8}{x}+\frac{11}{x+9}=1.5

Now, multiply every term by 2x(x+9) to clear denominators:  

16(x+9)+22x=3x(x+9)

Simplifying it we get

3x^{2}-11x-144=0

Solve the quadratic equation using formula

x= \frac{-b+\sqrt{b^{2}-4ac }}{2a}

putting a=3 , b= -11, c= -144

we get (x - 9)(3x + 16) = 0

where x=9 and x=\frac{-16}{3}

Neglect the negative answer as speed cannot be negative, so x = 9 mph

Hence, Jean's running speed is 9 mph and riding speed is x+9 = 9+9 = 18 mph

4 0
3 years ago
3
Svet_ta [14]

Answer:17,000

Step-by-step explanation:Add 532+150=680 then times it by 25 which equals 17,000

5 0
3 years ago
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I think that is correct answer but can you please help me
pochemuha
Yes you are right. it's 132
6 0
3 years ago
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What do I type in all the yellow boxes?
iVinArrow [24]

Answer:

1st blank: 4

2nd blank: -8

y=2

Step-by-step explanation:

-2²=4

4(-2)=-8

1 x 4 = 4

4 + -8 = -4

-4 + 6 = 2

3 0
2 years ago
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What is the answer??<br> I NEED 2 KNOW!! =~=
alexdok [17]
A because the square is in the (10) place and the circle is in the (1) place and 10 is 10 times bigger than 1
4 0
2 years ago
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