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3 years ago

Francis has thrice as much pencils as beatrice. Gale has 3 less pencils does Francis. how many pencils does Francis have?

Mathematics

2 answers:

Bogdan [553]3 years ago

5 0

Look online write the question and it tell u the annwer

SOVA2 [1]3 years ago

3 0

Francis has 9 pencils because 3x2=6+3=9

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-9 = X / -6 what does the variable

zvonat [6]

Answer:

x= 54

Step-by-step explanation:

-9=x/-6

x-6 on both sides

54= x

6 0

3 years ago

The random variable x represents the number of computers that families have along with the corresponding probabilities. Find the

Elena L [17]

Answer:

The correct option is (d).

Step-by-step explanation:

The complete question is:

The random variable x represents the number of computers that families have along with the corresponding probabilities. Use the probability distribution table below to find the mean and standard deviation for the random variable x.

x : 0 1 2 3 4

p (x) : 0.49 0.05 0.32 0.07 0.07

(a) The mean is 1.39 The standard deviation is 0.80

(b) The mean is 1.39 The standard deviation is 0.64

(c)The mean is 1.18 The standard deviation is 0.64

(d) The mean is 1.18 The standard deviation is 1.30

Solution:

The formula to compute the mean is:

$\text{Mean}=\sum x\cdot p(x)$

Compute the mean as follows:

$\text{Mean}=\sum x\cdot p(x)$

$=(0\times 0.49)+(1\times 0.05)+(2\times 0.32)+(3\times 0.07)+(4\times 0.07)\\\\=0+0.05+0.64+0.21+0.28\\\\=1.18$

The mean of the random variable x is 1.18.

The formula to compute variance is:

$\text{Variance}=E(X^{2})-[E(X)]^{2}$

Compute the value of E (X²) as follows:

$E(X^{2})=\sum x^{2}\cdot p(x)$

$=(0^{2}\times 0.49)+(1^{2}\times 0.05)+(2^{2}\times 0.32)+(3^{2}\times 0.07)+(4^{2}\times 0.07)\\\\=0+0.05+1.28+0.63+1.12\\\\=3.08$

Compute the variance as follows:

$\text{Variance}=E(X^{2})-[E(X)]^{2}$

$=3.08-(1.18)^{2}\\\\=1.6876$

Then the standard deviation is:

$\text{Standard deviation}=\sqrt{\text{Variance}}$

$=\sqrt{1.6876}\\\\=1.2990766\\\\\approx 1.30$

Thus, the mean and standard deviation for the random variable x are 1.18 and 1.30 respectively.

The correct option is (d).

3 0

3 years ago

I need help with this

NISA [10]

24. 43 degrees
25. 90 degrees
26. 47 degrees

I don’t really know what the question was so I assumed you wanted the angle of each?

7 0

3 years ago

0.15(y-0.2)=2-0.5(1-y)<br><br> The answer is -153/35 I just need to know how to get that

butalik [34]

Answer:

$y=-\dfrac{153}{35}$ .

Step-by-step explanation:

The given equation is

$0.15(y-0.2)=2-0.5(1-y)$

Using distributive property, we get

$0.15(y)+0.15(-0.2)=2-0.5(1)-0.5(-y)$

$0.15y-0.03=2-0.5+0.5y$

$0.15y-0.03=1.5+0.5y$

Isolate variable terms.

$0.15y-0.5y=1.5+0.03$

$-0.35y=1.53$

Divide both sides by -0.35.

$y=\dfrac{1.53}{-0.35}$

$y=-\dfrac{1.53}{0.35}\times \dfrac{100}{100}$

$y=-\dfrac{153}{35}$

Therefore, $y=-\dfrac{153}{35}$ .

6 0

3 years ago

Terri will replace the tile and carpet in her apartment. How many total square feet of tile and carpet must Terri purchase in or

lana66690 [7]

Answer:Terry need to purchase $195\ ft^{2}$ of tile and $663\ ft^{2}$ of carpet for a total area of $858\ ft^{2}$

Step-by-step explanation:

step 1

Find the square feet of tile

The area of the tile is equal to

$A=(15)(26-13)=195\ ft^{2}$

step 2

Find the square feet of carpet

Remember that

$38\frac{1}{2}\ ft=38.5\ ft$

The area of the carpet is equal to

$A=(38.5)(26)-195-(11)(13)\\A= 1,001-195-143\\A=663\ ft^{2}$

8 0

3 years ago