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2 years ago

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Mathematics

1 answer:

Sergeu [11.5K]2 years ago

6 0

Answer:

48, 39, 13

Step-by-step explanation:

48+39+13=100

i used trial and error

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Anvisha [2.4K]

Answer:

i can't really see to clear ..

Step-by-step explanation:

3 0

3 years ago

. Explain how to write 2 ÷ 5 as a fraction.

NemiM [27]

Use the number 2 as the top number (numerator) & 5 as the bottom number (denominator)

3 0

3 years ago

Solve. Please show your work

Sphinxa [80]

Answer:

128

Step-by-step explanation:

8^2√2^2

64√2^2 rewrite √2^2 as 2

64*2

=128

5 0

3 years ago

Beth needs to do a speech in her English class that can’t be more than 5 minutes long. She timed herself when she practiced last

Nesterboy [21]

Beth's speech at home ≤ 5 minutes and the duration at school is 15

seconds less than the duration of her speech at home, we have;

The inequality that shows the situation correctly is x ≤ 4.75 minutes

The possible times, <em>t</em>, for her speech at school are; 4.75 minutes, 4.5 minutes, and 4.0 minutes

<h3>What inequality can be used to represent the situation?</h3>

The possible question options are to complete the statements;

The inequality that shows the situation correctly, given that x is the time of speech at school

The time Beth needs to do the speech = Less than 5 minutes

The time she spent during the practice is less than or equal to 5 minutes

The duration of her speech in class = 15 seconds less than the duration at home

The inequality that shows the following situation correctly is therefore;

x ≤ 5 minutes - 15 seconds

(5 - 0.25) minutes = 4.75 minutes

Which gives;

x ≤ 4.75 minutes

The possible times for her speech at school are times x, less than or equal to 4.75 minutes

Which gives;

The possible times for her speech at school are; 4.75 minutes, 4.5 minutes, and 4.0 minutes

Learn more about inequality here:

brainly.com/question/22976364

8 0

3 years ago

Write an equation for an ellipse centered at the origin, which has foci at (\pm5,0)(±5,0)(, plus minus, 5, comma, 0, )and vertic

Virty [35]

Answer:

The equation of ellipse is

$\frac{x^2}{41}+\frac{y^2}{16}=1$

Step-by-step explanation:

The equation of an ellipse is

$\frac{(x-h)^2}{a^2}+\frac{(y-k)^2}{b^2}=1$

where(h,k) is the center and c is distance from the center to the foci is given by $a^2-b^2=c^2$ . a is the distance from the center to the vertices and b is the distance from the center to the co-vertices.

The center of the ellipse is the mid-point of the vertices.

The mid point of the vertices $(\pm\sqrt{41},0)$ is

= $(\frac{\sqrt{41}+(-\sqr{41})}2,\frac{0+0}2)$

=(0,0)

a is the distance between the center and the vertices.

So, $a=\sqrt{(0-\sqrt{41})^2+(0-0)^2}$

$=\sqrt{41}$

c is the distance between the center and the foci.

So, $c=\sqrt{(0-5)^2+(0-0)^2$

$a^2-b^2=c^2$

$\Rightarrow (\sqrt41)^2-b^2=5^2$

$\Rightarrow b^2=(\sqrt41)^2- 5^2$

$\Rightarrow b^2=41-25$

$\Rightarrow b^2=16$

The equation of ellipse is

$\frac{(x-0)^2}{(\sqrt{41})^2}+\frac{(y-0)^2}{16}=1$

$\Rightarrow \frac{x^2}{41}+\frac{y^2}{16}=1$

7 0

4 years ago