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Ivan
2 years ago
7

3d^2= 10 - 13d how do I factor this

Mathematics
1 answer:
exis [7]2 years ago
3 0

3d^2=10-13d\\3d^2+13d-10 = 0\\(3d -2)(d+5) = 0

This is the function factored

To find their solutions, we just need to set (3d - 2) = 0 and (d + 5) = 0

        d= 2/3 , -5

Hope that helps!

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What is the radius of a circle with a circumference of 8 ft to the nearest hundredth
agasfer [191]

Answer:

1.27

Step-by-step explanation:

r=\frac{C}{2\pi }

\frac{8}{2\pi }

=1.27

7 0
4 years ago
Ella has 0.5 lbs of sugar. How much water should she add to make the following concentrations? Tell Ella how much syrup she will
Oksanka [162]

Answer:

Ella should add 32\dfrac{5}{6} lbs of water.

Total weight of syrup 33\dfrac{1}{3} lbs

Step-by-step explanation:

Weight:

Weight of sugar = 0.5 lbs.

Weight of water added = x lbs

Total weight = 0.5 + x lbs

Percentage:

0.5 + x  --  100%

0.5  --  1.5%

Write a proportion:

\dfrac{0.5+x}{0.5}=\dfrac{100}{1.5}

Cross multiply:

1.5(0.5+x)=0.5\cdot 100\\ \\0.75+1.5x=50\\ \\1.5x=50-0.75\\ \\1.5x=49.25\\ \\x=\dfrac{49.25}{1.5}=\dfrac{4,925}{150}=\dfrac{197}{6}=32 \dfrac{5}{6}\ lbs

Ella should add 32\dfrac{5}{6} lbs of water.

Total weight of syrup

32\dfrac{5}{6}+\dfrac{1}{2}=32\dfrac{5}{6}+\dfrac{3}{6}=33\dfrac{1}{3}\ lbs

3 0
3 years ago
(will give brainliest!!)
Alex73 [517]
Hey there!

To figure out what "x" means, you can divide the numbers 126 and 14  . . .

126 divided by 14 = 9

9 x 14 = 126

9 = x

----------------
x = 9
----------------

Hope this helps you.
Have a great day!
4 0
3 years ago
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A marathon is 138,336 ft long. how long is this distance in miles?
Vlad1618 [11]
It is about 26.2 miles.

1 foot = about 0.000189394
4 0
4 years ago
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What's 2/8 divided by 5/16 simplified in fraction form?
irga5000 [103]
\frac{2}{8} \div \frac{5}{16} = \frac{2}{8} \times\frac{16}{5} = \frac{1}{4} \times\frac{16}{5} = \frac{4}{5} = 0.8
3 0
3 years ago
Read 2 more answers
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