-4x+y=6 -5x-y=21 solve by substiution

Answers

Answer 1

Answer:

55

Step-by-step explanation:

55 is your answer

Answer 2

Answer:

Step-by-step explanation:

Subtract

2

y

from both sides of the equation.

x

=

12

2

y

x

=

y

6

Replace all occurrences of

x

with

12

2

y

in each equation.

Tap for more steps...

12

+

2

y

=

y

6

x

=

12

2

y

Solve for

y

in the first equation.

Tap for more steps...

y

=

2

x

=

12

2

y

Replace all occurrences of

y

with

2

in each equation.

Tap for more steps...

x

=

8

y

=

2

The solution to the system is the complete set of ordered pairs that are valid solutions.

(

8

,

2

)

The result can be shown in multiple forms.

Point Form:

(

8

,

2

)

Equation Form:

x

=

8

,

y

=

2


Related Questions

The determinant of the matrix

Answers

Answer:57

Step-by-step explanation:

(7 x 9) - (-3 x -2) = 57

Un sure on this if someone could answer would be great !

Answers

Answer:

x= 5/2 x= (±sqrt13)/2

Step-by-step explanation:

go follow my friends on Snap.........

iminmymomscar_v itprettyalex old_creamcheese purplehawk_3000 dlowgetsmoney aj-0218

(15-17) (Purple Hawk_ 3000 is 21)

Answers

Answer:

i got you

Step-by-step explanation:

Answer: OK

Step-by-step explanation:

OK

HELPPP
Verify that csc theta cos theta tan theta=1

Answers

Answer:

See Explanation

Step-by-step explanation:

[tex] \csc \theta \: \cos \theta \: \tan \theta = 1 \\ \\ LHS = \csc \theta \: \cos \theta \: \tan \theta \: \\ \\ = \frac{1}{ \sin \theta} \: \times \cancel{ \cos \theta }\: \times \frac{ \sin \theta}{ \cancel{ \cos \theta }} \\ \\ = \frac{1}{ \cancel{ \sin \theta}} \: \times \cancel{ \sin \theta} \\ \\ = 1 \\ \\ = RHS \\ \\ hence \: proved[/tex]

Answer:

a) Only the first one is an identity.

Step-by-step explanation:

1). 8 cos O tan O csc O = 8   simplifies to:

cos O tan O csc O = 1

cos O * (sin O / cos O) * (1 /sin O)

=  cos O sin O / cos O sin O

= 1

So it is identity.

2) 13 sec^2 O/ cos^2 O - tan^2 O / cos^2O

= 13 sec^2 O - tan^2 O / cos^2 O

Now  sec^2 O = 1 + tan^2 O, so we have:

(13( 1 + tan^2 O) - tan^2 O) / cos^2 O

= (12 tan^2 O + 13) / cos^2 O

This is not always = 2 so its not an identity.

Step-by-step explanation:

You bought 15 bottles of apple juice and orange juice. The apple juice was $1.00 per bottle and the orange juice was $1.75 per bottle. You spent a total of $19.50. How many bottles of each type of juice did you buy?​

Answers

Answer:

13 bottles of apple juice and 2 bottles of orange juice.

i think :))

Step-by-step explanation:

I HOPE THIS HELPS YOU OUT WITH YOUR QUESTION! PLZ LET ME KNOW IF IT DID! IT MAKES ME FEEL GOOD THAT SOMEONE APPRECIATES IT! ANYWAY, IF YOU HAVE A FEW MINUTES PLZ GOT TO MY PROFILE AND THANK MY ANSWERS (THE MORE THE MERRIER)

Solve quickly please.

Answers

Find the change between the first two sets:

12-9 = 3

14.4 - 10.8 = 3.6

3.6/3 = 1.2

Now find the change between the last two sets:

12 - -3 = 15

14.4 - 3.6 = 10.8

10.8/15 = 0.72

1.2 does not equal 0.72 so the answer is No

Find the value of x. Round to the nearest tenth. 9 4 x = [?]​

Answers

Answer:

26.4° (nearest tenth)

Step-by-step explanation:

[tex]\boxed{sinθ = \frac{opp}{hyp} }[/tex]

[tex]sinx = \frac{4}{9} [/tex]

Taking the inverse of sine on both sides:

[tex]x = sin^{ - 1} ( \frac{4}{9} )[/tex]

x= 26.4° (nearest tenth)

a local taxi company charges a base fare of $3.20. the taxi company charges $0.40 for every minute the taxi is in service

Answers

Answer: The equation would be x = 3.20 + 40m where m represents the minutes of service and x is the total cost.

Step-by-step explanation:

Question 1 of 5 Select the correct answer. If the factors of quadratic equation are (x − 7) and (x + 3), what are the x-intercepts? (-7,0) and (-3,0) (-7,0) and (3,0) (3,0) and (7,0) (-3,0) and (7,0)

Answers

Answer:

(7,0) and (-3,0)

Step-by-step explanation:

Given the factors, we want to get the x-intercepts

All we have to do is to get the x values by equating the factors to zero

we have this as;

(x -7) = 0 and (x + 3) = 0

x = 7 and x = -3

The x-intercepts are;

(7,0) and (-3,0)

2. A kitten is gaining 0.6 pounds per week. The kitten is currently seven pounds. After how many weeks will the kitten be at least 10 pounds?

Answers

Answer:

Here is the answer

Step-by-step explanation:

The kitten weighs_____pounds every week                    -0.6 pounds

Weight of the kitten at current time                                    -7 pounds

Weeks it will take for the kitten to reach 10 pounds         -0.6+7=7.6

                                                       now round it off and you will get 7

                            ∴the kitten will take 7 more weeks for getting to 10 pounds            

The kitten will be at least 10 pounds after 5 weeks. Let's set up an equation to solve for the number of weeks needed for the kitten to reach at least 10 pounds.

Let "w" represent the number of weeks.

The weight of the kitten after "w" weeks can be calculated as:

Weight = Initial weight + (Weight gained per week * Number of weeks)

Weight = 7 + (0.6 * w)

We want to find the number of weeks when the weight is at least 10 pounds:Weight ≥ 10

Substituting the equation for weight:

7 + (0.6 * w) ≥ 10

Subtracting 7 from both sides:

0.6 * w ≥ 3

Dividing both sides by 0.6:

w ≥ 3 / 0.6

w ≥ 5

Therefore, the kitten will be at least 10 pounds after 5 weeks.

To know more about kitten:

https://brainly.com/question/29277335

#SPJ2

What is the value of X enter your answer in the box

Answers

X = 5
If C is the midpoint, it means AC and CQ are equal length, meaning:
7x+3 = 38
Subtract 3 from each side, then divide by 7 on each side, and you’ll get x = 5

If a sporting goods store has 40 basketballs, 39 baseballs, 24 footballs, 51 hockey pucks, and 16 lacrosse sticks.
Write the following ratio in simplest form.
Lacrosse Sticks to Basketballs

Answers

Answer:

40/16

2/5

Thus the ratio

= 2:5

A manager records the number of projects employees complete in one month. If the manager wants to summarize the data, which two statements are true?

The manager should use a measure of center to summarize how many projects the employees that complete the least projects complete.
The manager should use a measure of center to summarize how the number of projects employees complete differs.
The manager should use a measure of center to summarize the typical number of projects an employee completes.
The manager should use a measure of variability to summarize how the number of projects employees complete differs.
The manager should use a measure of variability to summarize the typical number of projects an employee completes.

Answers

Answer:

The manager should use a measure of center to summarize how many projects the employees that complete the least projects complete.

Step-by-step explanation:

Their are 2 ppl in front of me shot 1 how many are left

Answers

Answer:

1

Step-by-step explanation:

Determine if the expression -z^3 + 8x is a polynomial or not. If it is a polynomial, state the type and degree of the polynomial. (Someone help me )

Answers

Answer No because it does not have a coefficient

Step-by-step explanation:

Please explain! What is the solution for the inequality below:
12- x<8
Please help!!!!!

Answers

Answer:

The solution for the inequality is x>4.

A model car is made to a scale of 1:50 (model: real). If the model has a length of 10 cm, calculate the length of the real car (answer in meters).

Answers

Answer:

5 m

Step-by-step explanation:

A model car is made to a scale of 1:50 (model: real).

If the model has a length of 10 cm, calculate the length of the real car (answer in meters).

We have a scale of :

model: real = 1:50

The model has a length of 10cm

Hence:

1 cm = 50 cm

10 cm = x cm

Cross Multiply

x cm × 1cm = 10 cm × 50 cm

x cm = 10 cm × 50 cm/1cm

x cm = 500 cm

The length of the real car is 500cm

Converting the length of the real car to meters

100cm = 1 m

500 cm = x m

Cross Multiply

100cm × x m = 500 cm × 1 m

x m = 500 cm × 1 m/100 cm

x m = 5 m

The Length of the real car in meters is 5m

Please answer this question! It’s almost due!
(Answer Number 8)

Answers

Answer:

its incorrect.

Step-by-step explanation:

y = 100 - 8.9x percent

Answers

I’m not sure on this question but if you plug it into the calculator it says it is X = 1123.59551

Can someone explain their answer? ​

Answers

The answer is -36 because
13,6,-1,-8,-15,-22,-29,-36

Answer: -36

Step-by-step explanation:

13, 6, -1

to get from 13 to 6 and 6 to -1, you would subtract by 7 so keep subtracting by 7 until you get 8 different terms

13, 6, -1, -8, -15, -22, -29, -36

the eighth term would be -36

i hope that makes sense

5. Write the slope-intercept form of the equation that passes through the point (-1, 2) and is perpendicular to the line y = 3/2x + 6
O y = 3/2x + 5/2
O y = 3/2x + 4/3
O y = -2/3x + 5/2
O y = -2/3x + 4/3

Answers

Answer:

D.  y = -2/3 x + 4/3

Step-by-step explanation:

When you have a perpendicular line, everything except the y-intercept becomes opposite. So 3/2x + 6 will become -2/3x.

To find the slope, you have to plug the coordinates into the equation so far which is y = -2/3x + b

y = -2/3x + b

2 = -2/3(-1) + b

2 = 2/3 + b

4/3 = b

So the equation is y = -2/3 x + 4/3.

PLZZZ HELP WHAT IS THE AREA OF THIS TRAPEZOID?!?!?!

Answers

152 or 76 either one of those 2

What is the additive 3x -6

Answers

Answer:

-18

Step-by-step explanation:

Answer:

−3x+6

Step-by-step explanation:

What goes on the green box?

Answers

11 because you would add the 14 and 2 which would be 9^16 then you would subtract 5 which would make it 9^11

t/3+9=12 what does this mean in algerba

Answers

Answer:

t=9

Step-by-step explanation:

subtract 9 from both sides

t/3=3

t=9

If y is directly proportional to x and y = 17.5 when x = 21.

Answers

Then what’s the question?

I have two congruent sides.I also have two congruent angle i am (n) -------- that measures 45 each s

Answers

Answer:

Isosceles triangle

Step-by-step explanation:

Given

Two congruent angles and two congruent sides

Base on the given description, the concept being described is an isosceles triangle, as it has two congruent sides and two congruent angles.

If each angle measures 45 degrees each, then the third angle is 90 degrees.

This is shown below.

[tex]\theta + 45 + 45= 180[/tex] --- angles in a triangle

[tex]\theta + 90= 180[/tex]

Subtract 90 from both sides

[tex]\theta = 90[/tex]

How many degress is angle BHA?

Answers

Answer:

90°

Step-by-step explanation:

follow the tangent rule.

What is the answer to 18+6•2^2

Answers

Answer:

42

Step-by-step explanation:

Answer:

96

Step-by-step explanation:

first you have to multiply your exponent which is 2 x 2 which is 4 then do the problem which is 18 + 6 = 24 x 4 = 96

A salesperson had $240, 000 in sales last year, which is 60% of the sales she had this year. Which equation could be used to determine x, the salesperson's total amount of sales, in dollars, for this year?

Answers

Answer: $400,000

Step-by-step explanation:

Let the salesperson's total amount of sales, in dollars, for this year be represented by x.

Therefore, 60% of x = $240,000

60/100 × x = $240,000.

0.6 × x = $240,000..

x = $240000 / 0.6

x = $400,000

Therefore, the salesperson's total amount of sales, for this year is $400,000.

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