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3 years ago

Can someone pls help

Mathematics

1 answer:

kolbaska11 [484]3 years ago

3 0

Answer:

option c

Step-by-step explanation:

we need to divide the amount of money by no. of friends

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Factor the polynomial expression x^4+18x^2+81

Vikentia [17]

Answer:

Step-by-step explanation:

Hello,

please consider the following

$x^4+18x^2+81=(x^2)^2+2*(3^2)x^2+(3)^4\\\\=(x^2+9)^2$

hope this helps

4 0

3 years ago

Pls help With this question thank you

Lapatulllka [165]

Answer:

$CD=4 \text{ cm }$

Step-by-step explanation:

We have a similarity of triangles. Once the side BC and ED are parallel,

$\frac{BC}{AC} =\frac{ED}{AD}$

$\frac{10}{AC} =\frac{5}{4}$

Once $AC=AD+CD \Rightarrow AC=4+CD$

$\frac{10}{4+CD} =\frac{5}{4}$

$5CD+20=40$

$5CD=20$

$CD=4 \text{ cm }$

6 0

4 years ago

Between 2000 and 2010, the percentage of fatal automobile accidents due to speeding decreased by 34% to 16%. What percentage of

docker41 [41]

Answer: 50%

Step-by-step explanation:

In 2010 the percentage of fatal accidents was 16%.

This is 34% less than it was in 2000 because the text says that the 2010 percentage was 16% after being reduced by 34% from 2010.

The percentage of fatal accidents in 2000 is therefore:

= 2010 fatal percentage + Percentage reduced from 2000

= 16% + 34%

= 50%

6 0

3 years ago

Only do 16 pls help me i will give u brainliest if you help

USPshnik [31]

Answer:

16) 18.5 hours

Step-by-step explanation:

40gifts = 5hrs

40/5 = 8

8gifts = 1hr

148/8 = 18.5

In 18.5 hours, 148 gifts are wrapped.

hope this helps and is right. p.s. i really need brainliest :)

8 0

3 years ago

Identify the type of conic section that has the equation 9x2+ 16y2 = 144 and identify its domain and range.

Kobotan [32]

9 x² + 16 y² = 144 /:144
$\frac{ x^{2} }{16} + \frac{ y^{2} }{9} =1$
General formula of ellipse ( the center is at the origin ): $\frac{ x^{2} }{ a^{2} }+ \frac{ y^{2} }{ b^{2} } =1$
a² = 16, b² = 9
Domain: [-a, a ] = [-4, 4]
Range:[-b, b ]
Answer: B ) ellipse.
Domain: { -4 ≤ x ≤ 4 }
Range: { -3 ≤ y ≤ 3 }

8 0

3 years ago