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emmainna [20.7K]
3 years ago
11

Please answer fast will mark brainliest

Mathematics
2 answers:
bearhunter [10]3 years ago
7 0

Answer:

7/8

Step-by-step explanation:

Yes

tiny-mole [99]3 years ago
5 0

Answer:

option C is the correct one according to me

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A man rides a bicycle a distance of 48 miles in a certain amount of time. If the man increased his speed by 2 miles per hour, he
seropon [69]
Recall your d = rt, distance = rate * time.

so, in his usual speed, say is hmm "r" mph, so in his usual "r" speed, he rolls on for the 48 miles and it takes him "t" hours to get there.

now, if he increases his speed by 2 mph, then his new speed is "r + 2", and he arrives there 4 hours earlier, so if he took "t" hours going at "r" speed, then when he's going faster at "r + 2", he only takes "t - 4" hours, for the same 48 miles.

\bf \begin{array}{lccclll}
&\stackrel{miles}{distance}&\stackrel{mph}{rate}&\stackrel{hours}{time}\\
&------&------&------\\
\textit{usual speed}&48&r&t\\
\textit{faster speed}&48&r+2&t-4
\end{array}
\\\\\\
\begin{cases}
48=rt\implies \frac{48}{r}=\boxed{t}\\
48=(r+2)(t-4)\\
----------\\
48=(r+2)\left( \boxed{\frac{48}{r}}-4 \right)
\end{cases}
\\\\\\
48=(r+2)\left( \cfrac{48-4r}{r} \right)\implies 48r=(r+2)(48-4r)


\bf 48r=48r-4r^2+96-8r\implies 0=-4r^2+96-8r
\\\\\\
4r^2+8r-96=0\implies r^2+2r-24=0
\\\\\\
(r+6)(r-4)=0\implies r=
\begin{cases}
-6\\
\boxed{4}
\end{cases}

it cannot be a negative value, since is just a forward speed rate, so can't be -6.
8 0
3 years ago
Read 2 more answers
What is 85% shaded ?
BARSIC [14]

Answer:

That it's shaded an 85% only (of 100%)Φ

8 0
3 years ago
The ratio of the number of roses to the number of lilies in a flower shop is 3:5. One sixth of the roses and half of the lilies
Yuri [45]

Answer:

There are 240 lilies in the flower shop.

Step-by-step explanation:

The ratio of number of roses to number of lilies = 3:5

Let the number of roses be represented by x, and the number of lilies be represented by y.

Given that: \frac{1}{6} of x and \frac{1}{2} of y are white.

Thus;

\frac{1}{6} of x = 24

\frac{x}{6} = 24

x = 6 x 24

  = 144

There are 144 roses in the shop.

The ratio of number of roses to number of lilies = 3:5

So that, \frac{144}{3} = 48

y = 48 x 5 = 240

The number of lilies in the shop = 240

The ratio of number of roses to number of lilies = 144:240

                                                                                  = 3:5

6 0
3 years ago
Read 2 more answers
CAN SOMEONE PLEASE HELPP WITH THUS MATHHHHH
Darina [25.2K]

Answer:

for every set you add 10 pounds.

8 0
3 years ago
If the HCF and LCM of two numbers are 14 and 840 respectively . If one number is 42 Then find another one. ​
katen-ka-za [31]

Answer:

HCF X LCM= product of two numbers

14 x 840 = 42 x other number

other number= 14x840/42=280

6 0
3 years ago
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