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4 years ago

Apply the distributive property to write an equivalent expression 21b + 23c

Mathematics

1 answer:

klemol [59]4 years ago

4 0

Answer:

7 (3b + 23/7 c)

Step-by-step explanation:

Normally, distributive property to find out a common denominator requires both constants (21 and 23) to have a common denominator which isn't present in this case. Therefore, you would require a fraction in your answer.

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When Gabriella runs the 400 meter dash, her finishing times are normally distributed with a mean of 79 seconds and a standard de

kupik [55]

Answer:

(78, 80)

Step-by-step explanation:

Given a normal distribution :

Mean = 79 seconds

Standard deviation = 0.5 seconds

Using the empirical rule :

95% of her finishing times :

According to the empirical rule, 95% represents 2 standard deviations from the mean that is ± 2 standard deviations from the mean score or value.

Hence ;

The interval will be defined as ;

Mean ± 2(standard deviation)

79 ± 2(0.5)

79 ± 1

(79 - 1) ; (79 + 1)

78 ; 80

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3 years ago

3 over 25 as a percent

Bond [772]

It is 12%. This is because if you divide 3 into 25, you get 0.12. In conclusion, it would be 12%.

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4 years ago

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Quien me ayuda con eso le dare los puntos que sea porfa

IgorLugansk [536]

Answer:

3=c 4=a

Step-by-step explanation:

7 0

3 years ago

Find the volume of the wedge-shaped region (Figure 1) contained in the cylinder x2+y2=81 and bounded above by the plane z=x and

Natali5045456 [20]

In cylindrical coordinates, the volume is given with

$\displaystyle\int_{\theta=-\pi/2}^{\theta=\pi/2}\int_{r=0}^{r=9}\int_{z=0}^{z=r\cos\theta}r\,\mathrm dz\,\mathrm dr\,\mathrm d\theta$
$=\displaystyle\int_{\theta=-\pi/2}^{\theta=\pi/2}\int_{r=0}^{r=9}r^2\cos\theta\,\mathrm dr\,\mathrm d\theta$
$=\displaystyle\left(\int_{\theta=-\pi/2}^{\theta=\pi/2}\cos\theta\,\mathrm d\theta\right)\left(\int_{r=0}^{r=9}r^2\,\mathrm dr\right)$
$=486$

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3 years ago

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Plz answer my question...it is urgent..I have my exams...plz plz <br> ASAP

Ainat [17]

Answer:

devide 10 by 5 = 2 to the power of 8 =256

ps give more points and it will be answered quicker

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3 years ago

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