What is the solution to the system of equations?

{2x+3y=23
4x−5y=13

Answer:

-22

Step-by-step explanation:

f(x) = -2x^2 - 4 for x = 3

f(3) = -2(3)^2 - 4

f(3) = -2(9) - 4

f(3) = -18 - 4

f(3) = -22

Answer: -22

Answer:

-22

Step-by-step explanation:

Answer:

f= -14/3

Step-by-step explanation:

-f-6-2f=8

(given)

-3f-6=8

(combine like terms)

-3f=14

(add 6 to both sides)

f= -14/3

Answer:

20 to 4

Step-by-step explanation:

is the answer because it is the amount of students to adults.

Answer:

9.6 cm

Step-by-step explanation:

Since the shapes are similar, we can write a proportion. Let x be the length of MN.

9/12 = 7.2/x Write a proportion.

9x = 12(7.2) Use cross products.

9x = 86.4 Multiply.

x = 9.6 Divide both sides by 9.

Side MN is 9.6 cm.

Answer:

Growth rate of plants compared to average daily temperature.

Step-by-step explanation:

Answer:

1.010101e+12

Step-by-step explanation:

28282828282838.28282828282839 / 28

Answer:

The answer to the question is 26.

Answer:

Step-by-step explanation:

Answer:

B.(10,-1)

Step-by-step explanation:

10-(-1)=11

2(10)+(-1)=19

20+(-1)=19

Answer:

They both have the #5 and they both have 3 #'s that are prime?

Step-by-step explanation:

Answer:

180 customers

Step-by-step explanation:

72/100 × x/250

cross multiply

72 × 250 = 100 × x

18000 = 100x

divide both sides by 100

180 = x

Answer:

180

Step-by-step explanation:

72% of 250 is 180 :)

Answer:

The mean for the probability mass function is 0.64287.

Step-by-step explanation:

The complete question is:

In a batch of ​28 pedometers, 3 are believed to be defective. A​ quality-control engineer randomly selects 6 units to test. Let random variable X = the number of defective units that are among the units tested.

The probability mass function ​f (x) is:

f (x)​ = {(0, 0.47009​), ​(1, 0.42308​), ​(2,​ 0.10073), ​(3, 0.00611​)}

Solution:

The mean of a discrete random variable X with probability mass function f (x) is:

[tex]\mu=\sum\limits^{n}_{x=1}{x\times f(x)}[/tex]

Compute the mean for the probability mass function above as follows:

[tex]\mu=\sum\limits^{n}_{x=1}{x\times f(x)}[/tex]

  [tex]=(0\times 0.47009)+(1\times 0.42308)+(2\times 0.10073)+(3\times 0.00611)\\=0+0.42308+0.20146+0.01833\\=0.64287[/tex]

Thus, the mean for the probability mass function is 0.64287.

This values represents the expected number of defective units for every 6 units tested.

Answer:

Whatever problem choice is equivalent to 2

Step-by-step explanation:

Answer:

Slope of line g = [tex]1\frac{1}{3}[/tex]

Step-by-step explanation:

* Mathematics rule: If two lines are perpendicular to each other, then the product of their slopes is equal to -1 .

∴ [tex]-\frac{3}{4}[/tex] × slope of line g = -1

Slope of line g = -1 ÷ [tex]-\frac{3}{4}[/tex] = 4/3 = [tex]1\frac{1}{3}[/tex]

Answer:

C

Step-by-step explanation:

The graph would have a positive y-intercept

The y-intercept is when x = 0

To find the y-intercept, plug in 0 for x

y = -5(0) + 10

y = 0 + 10

y = 10

10 is a positive number

Y-intercept is positive

Answer:

C

Step-by-step explanation:

Answer:

I) Eq(1) reason: sum of segments of a straight line

II) Eq(2) reason: Given PQ = ST & PS = RT

III) Eq(3) reason: sum of segments of a straight line

IV) Eq(4) reason: Same value on right hand sides of eq(2) and eq(3) demands that we must equate their respective left hand sides

V) Eq(5) reason: Usage of collection of like terms and subtraction provided this equation.

Step-by-step explanation:

We are given that;

PS = RT and that PQ = ST

Now, we want to prove that QS = RS.

From the diagram, we can see that from concept of sum of segments of a straight line we can deduce that;

PQ + QS = PS - - - - (eq 1)

Now, from earlier we saw that PQ = ST & PS = RT

Thus putting ST for PQ & PS for RT in eq 1,we have;

ST + QS = RT - - - - (eq 2)

Again, from the line diagram, we can see that from concept of sum of segments of a straight line we can deduce that;

RS + ST = RT - - - - -(eq 3)

From eq(2) & eq(3) we can see that both left hand sides is equal to RT.

Thus, we can equate both left hand sides with each other to give;

ST + QS = RS + ST - - - (eq 4)

Subtracting ST from both sides gives;

ST - ST + QS = RS + ST - ST

This gives;

QS = RS - - - - (eq 5)

Thus;

QS = RS

Proved

Answer:

153.60

Step-by-step explanation:

This will help you and make me burillan

Answer:254 days

Joanne and Ed Greenwood built a new barn with an attached arena. To finance the loan, they paid $1,326 interest on $47,600 at 4%. What was the time, using exact interest? (Do not round intermediate calculations. Round up your answer to the nearest day.)

Step-by-step explanation

Note that

Interest is represented by I=1326

The principal is represented by P=47,600

Rate is R =4%

And Time is year

Interest is calculated using the formulae,

I =PRT/100

From the above formulae, time can be calculated as

T=100I/PR

T= 100×1326/(47600×4)

T= 132600/190400

T= 0.6964 years

To convert to days, multiply by 365(since those no of days make a year)

T= 0.6964×365=254 days

This was approximated to the nearest day

Answer is 254 days

Answer:

look on khan academy

Step-by-step explanation:

Answer:

28

Step-by-step explanation:

you find the length of the side of one cube by using the equation they gave you, so 343^(1/3) would be 7. they're are 4 cubes lined up, so you multiply 7 by 4 to get 28.

Answer:

6 miles

Step-by-step explanation:

3 plus 3= 6

Answer:

6 miles

Step-by-step explanation:

3 miles + 3 miles = 6 miles

Answer:

m perpendicular = - 3

Step-by-step explanation:

To start with, we need to find the slope of the given line, by solving for y in the equation

x - 3 y = 12

x = 3 y + 12

x - 12 = 3 y

divide by 3 both sides:

y = x/3  - 12/3

y = (1/3) x - 4

then, the slope of the given line is 1/3, and according to the property of perpendicular lines, a perpendicular slope will be the 'opposite of the reciprocal" of the slope of the original line. That is: the value - 3.

Then the slope of the perpendicular line is: m = - 3.

Answer:

3

Step-by-step explanation:

Answer: 548654, 550654, 995841, 1256441, 1485554, 1547521, and 1547656

Hope this helps

Answer:

2.5 components but if you need to round 2

Answer:  

150 per 60 mins would be 2.5 per 1 min

Step-by-step explanation:

150/60 = 2.5

Answer:

please be more specific