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4 years ago

Solve. Show your work 7 + 5x = -10

Mathematics

2 answers:

Grace [21]4 years ago

7 0

Answer:

x=-3.4

Step-by-step explanation:

7+5x=-10

subtract -7 to both sides

-10-7 is -17

divide 5 both sides

5x=-17

x=-3.4

mash [69]4 years ago

6 0

Answer:

x = -17/5

Step-by-step explanation:

Subtract 7 from both sides

5x= -10-7

Simplify -10 - 7 to -17

5x = -17

Divide both sides by 5

x= -17/5

Decimal Form: -3.4

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Sides of a square is 3^2/7 what is the area of the square

nydimaria [60]

Area = square of the measure of a side = 3^(2/7) * 3^(2/7)

= 3 ^(2/7 + 2/7) = 3^(4/7)

Option 2

6 0

3 years ago

Can someone help me pls

Gnesinka [82]

Point M bisects Line RS. The length of RS is also 44 because RM and MS are congruent and MS has a length of 22.

4 0

3 years ago

A particular sale involves four items randomly selected from a large lot that is known to contain 9% defectives. Let X denote th

umka2103 [35]

Answer:

The expected repair cost is $3.73.

Step-by-step explanation:

The random variable X is defined as the number of defectives among the 4 items sold.

The probability of a large lot of items containing defectives is, p = 0.09.

An item is defective irrespective of the others.

The random variable X follows a Binomial distribution with parameters n = 9 and p = 0.09.

The repair cost of the item is given by:

$C=3X^{2}+X+2$

Compute the expected cost of repair as follows:

$E(C)=E(3X^{2}+X+2)$

$=3E(X^{2})+E(X)+2$

Compute the expected value of X as follows:

$E(X)=np$

$=4\times 0.09\\=0.36$

The expected value of X is 0.36.

Compute the variance of X as follows:

$V(X)=np(1-p)$

$=4\times 0.09\times 0.91\\=0.3276\\$

The variance of X is 0.3276.

The variance can also be computed using the formula:

$V(X)=E(Y^{2})-(E(Y))^{2}$

Then the formula of $E(Y^{2})$ is:

$E(Y^{2})=V(X)+(E(Y))^{2}$

Compute the value of $E(Y^{2})$ as follows:

$E(Y^{2})=V(X)+(E(Y))^{2}$

$=0.3276+(0.36)^{2}\\=0.4572$

The expected repair cost is:

$E(C)=3E(X^{2})+E(X)+2$

$=(3\times 0.4572)+0.36+2\\=3.7316\\\approx 3.73$

Thus, the expected repair cost is $3.73.

4 0

3 years ago

Subtract. 29.82 − 8.001 The difference is

maks197457 [2]

Answer:

21.819 is the difference

8 0

3 years ago

X-5y=33 5x-6y=70 solve the system by the addition method

BARSIC [14]

For this case we have the following system of equations:

$x-5y = 33\\5x-6y = 70$

We multiply the first equation by -5:

$-5x + 25y = -165$

Thus, we have the equivalent system:

$-5x + 25y = -165\\5x-6y = 70$

We add the equations:

$-5x + 5x + 25y-6y = -165 + 70\\19y = -95\\y = - \frac {95} {19}\\y = -5$

We find the value of the variable "x":

$x-5 (-5) = 33\\x + 25 = 33\\x = 33-25\\x = 8$

Thus, the solution of the system is:

$(x, y) :( 8, -5)$

Answer:

$(x, y) :( 8, -5)$

7 0

3 years ago