What is the first step to solve the following system of equations using substitution?
X-y=-1
2x-y=3

Answer:

I think I know the answer but what is the v for between the 12 and the 2

Step-by-step explanation:

Answer:

12v² + 330

Step-by-step explanation:

Collect like terms: 12v² + (310 + 20)

Simplify: 12v² + 330

May I please have Brainliest?!!!!

Answer:

5/2

Step-by-step explanation:

rise/run. the graph rises 5 and over 2 to the next point

Answer:

22 people

Step-by-step explanation:

Change 2 3/4 into a fraction, 11/4.

Then divide by 1/8

11/4 x 8/1 = 22

Answer:i think its -51

Step-by-step explanation:(-18+12)-45

Answer:

[tex]1\frac{14}{15}[/tex]           or exact form [tex]\frac{29}{15}[/tex]

Step-by-step explanation:

Um bc im trap bunny bubbles

Answer:

the pentagon (3rd one)

Step-by-step explanation:

definition of a quadrilateral literally means a shape with 4 sides

Answer:

-2

Step-by-step explanation:

y=ax+b

Put the numbers into that equation.

-1=1/2*2+b

Simplify:

-1=1+b

-1-1=b

-2=b

Hope this helped! :)

Answer:

I think is 2/9 but I may be wrong

Given that,

Slope of the line, m = -6/7

It contains the point (-5,-8)

To find,

The equation of line.

Solution,

Use the formula as follows :

y = mx+b

Put x = -5 and y = -8

[tex]-8=\dfrac{-6}{7}(-5)+b\\\\b=-8-\dfrac{6}{7}\times 5\\\\b=-12.28\\\\=-\dfrac{86}{7}[/tex]

So, the equation of line is :

[tex]y=\dfrac{-6}{7}x-\dfrac{86}{7}[/tex]

Answer:

$15

Step-by-step explanation:

Good Morning!

If the small toy car costs $3.00, and the large toy car costs 5 times as much as the small one, we can multiply the value of the small car by five to find the value of the large car.

Since five times 3 = 15, the value of the large toy car is $15.00.

~theLocoCoco

Answer:

0.28985507246

Step-by-step explanation:

Answer:

if you meant 7 divided by 24.25 your answer would be 20/69 or 0.2898 in decimal form

Step-by-step explanation:

Step-by-step explanation:

m <5=71

m <8=109

-------------

Answer:

∠5 = 71°

∠8 = 109°

Step-by-step explanation:

∠1 = 71°

∠5 = 71°  (the same as ∠1 = 71°) its a corresponding angle

∠8 = 180 - ∠5

∠8 = 180 - 71

∠8 = 109°

(-2,-2) is the answer .............

Answer:

D. (272, 127)

Step-by-step explanation:

It's actually not A, I just took the test. The right answer is D.

Answer: D) (272, 127)

Step-by-step explanation: :D

Answer: True

Step-by-step explanation:

Answer:

Z = +3

Step-by-step explanation:

3 squared is 9 and 9 times 5 is 45 so 45 minus 45 is zero

Answer:

Z = +or- 3, or Option A, would be the best answer choice out of the ones provided above.

Answer:

x=7

Step-by-step explanation:

Answer:

43.2 MB

Step-by-step explanation:

The amount that has been downloaded is 17.5% of 247 MB. This is equal to 17.5% [tex]\times[/tex] 247 (in general, "of" always indicates that you should multiply). 17.5% is equal to [tex]17.5/100[/tex], or 0.175.

Therefore, the amount that has been downloaded is 0.175 * 247, which is 43.225 MB. Rounded to the nearest tenth, this is 43.2 MB.

Answer: 0.1112

Step-by-step explanation:

Let X be a random variable .

Given: A normal population has a mean m=33 and standard deviation s = 9.

The probability that a randomly chosen value will be greater than 44 will be :-

[tex]P(X>44)=P(\dfrac{X-m}{s}>\dfrac{44-33}{9})\\\\=P(Z>\dfrac{11}{9})\\\\=P(Z>1.22)\\\\ =1-P(Z<1.22)\\\\=1-0.8888\\\\=0.1112[/tex]

Hence, the probability that a randomly chosen value will be greater than 44 = 0.1112

A normal population has a mean m=33 and standard deviation s = 9. the probability that a randomly chosen value will be greater than 44 is - 28.774%

Given:

mean m=33

standard deviation s = 9

probability = ?

Solution:

(34-39)/9 = -0.5556

which mean

P(Z<-0.5556) ≈ 0.28774

or 28.774%

Thus, A normal population has a mean m=33 and standard deviation s = 9. the probability that a randomly chosen value will be greater than 44 is - 28.774%

Learn more:

https://brainly.com/question/475676

Answer:

Changes made to your input should not affect the solution:

(1): "x2" was replaced by "x^2". 1 more similar replacement(s).

STEP

1

:

Equation at the end of step 1

(12 • (x3)) - 32x2

STEP

2

:

Equation at the end of step

2

:

(22•3x3) - 32x2

STEP

3

:

STEP

4

:

Pulling out like terms

4.1 Pull out like factors :

12x3 - 9x2 = 3x2 • (4x - 3)

Final result :

3x2 • (4x - 3)

Answer: 13. yes 14. no

Step-by-step explanation:

13. same angles sized down

14. different angles sized down

Answer:

3/4

Step-by-step explanation:

3/4

We can change all fractions to denominator 20 to easily vary them

13/20=13/20

3/5=12/20

3/4=15/20

7/10=14/20

Answer:

-200 ft

Step-by-step explanation:

sea level is 0 ft

Answer:

Its -200ft because sea is 0

Answer:

1. C

2. B

3. A

4. D

is the correct answer

Answer:

1. 1/3 --> all sides in an equilateral triangle are equal, so the constant of proportionality would be 1/3

2. 10/4*9 = 22.5

3. 8/2 = 4

4. c/g = m

Answer:

a) [tex]C(x)[/tex] is increasing in two regions: (i) [tex](+\infty, 8\,s)[/tex] and (ii) [tex](10\,s,+\infty)[/tex].

b) [tex]C(x)[/tex] decreases in [tex](8\,s, 10\,s)[/tex].

Step-by-step explanation:

Let [tex]C(x) = x^{3}-27\cdot x^{2}+240\cdot x +850[/tex], where [tex]x[/tex] is the quantity of insecticide, measured in hundreds of liters, and [tex]C(x)[/tex] is the total manufacturing cost as a function of the quantity of the insecticide, measured in US dollars. A possible approach to determine which regions of [tex]C(x)[/tex] are decreasing and increasing by means of the first derivative and graphing tools. The first derivative of the function is:

[tex]C'(x) = 3\cdot x^{2}-54\cdot x+240[/tex] (1)

Please notice that regions where C(x) is increasing has [tex]C'(x) > 0[/tex], whereas [tex]C'(x) < 0[/tex] when [tex]C(x) < 0[/tex].

We notice that [tex]C(x)[/tex] is increasing in two regions: (i) [tex](+\infty, 8\,s)[/tex] and (ii) [tex](10\,s,+\infty)[/tex]. Besides, [tex]C(x)[/tex] decreases in [tex](8\,s, 10\,s)[/tex].

Answer:

4.444444

Step-by-step explanation: