Mathematics High School

Create an equivalent system of equations using the sum of the system and the first equation.

−5x + 4y = 8
4x + y = 2

Answers

Answer 1

Answer: 829393

Bn

Step-by-step explanation:

Answer 2

Answer:

−5x + 4y = 8

−x + 5y = 10

Step-by-step explanation:

Related Questions

Which value of x from the set (5, 6, 7, 8) makes this equation true?
3x24
O A 5
OB. 6
O c. 7
OD
8

Answers

Answer:

D. X = 8

Step-by-step explanation:

Reason: 8 x 3 Would get you 24

If your friend is driving at a speed of 25 miles per hour, how many miles per second is your
friend traveling?

Answers

Answer:

0.0069444444

Step-by-step explanation:

41. Write a proof of the theorem that states if an angle of a quadrilateral is supplementary to both of its consecutive angles, the quadrilateral is a parallelogram.
Given: m∠F + m∠G = 180, m∠F + m∠J = 180
Prove: FGHJ is a parallelogram

What statement proves the theorem?
A. By the Angle Addition Postulate m∠F = m∠J and m∠G = m∠H. So, by the definition of a parallelogram, FGHJ is a parallelogram.
B. By the Converse of the Same-Side Interior Angles Postulate, FJ|| GHand FG||JH. So, by the definition of a parallelogram, FGHJ is a parallelogram.
C. By the Polygon Interior Angle-Sum Theorem, m∠F + m∠G + m∠F + m∠J = 360. So, by the definition of a parallelogram, FGHJ is a parallelogram.
D. By the Converse of the Same-Side Interior Angles Postulate, FJ = JH andFG=JH. So, by the definition of a parallelogram, FGHJ is a parallelogram.

Answers

Answer:

B.

there's proof that opposite sides are parallel so it must be a parallelogram

Step-by-step explanation:

A mobile phone carrier charges an extra fee if a customer uses more than 500 minutes each month. Tom has already used 230 minutes this month. Which inequality can be used to determine how many more minutes Tom can use this month without going over the 500-minute limit?


A. 230 + m > 500

B. 230 + m greater-than-or-equal-to 500

C. 230 + m < 500

D. 230 + m less-than-or-equal-to 500

Answers

Answer:

230 + m < 500

Step-by-step explanation:

The inequality shows that the combined total of 230 and m (stands for minutes Tom can use) is less than 500.

i believe the answer would be C

Miles per Hour, Inches per Second, Feet per Min are all examples of ?

Answers

Distance measurments

Write -8 5/6 as the decimal round to the nearest hundredth

Answers

Answer:

-8.83

Step-by-step explanation:

I took 5/6 and converted into a decimal and it is 0.83333333333 and it is 0.83 rounded to the nearest hundredth and then I added -8 to get -8.83.

A class of 36 students has 18 boys. What is the ratio of girls to boys? What is the ratio of boys to girls?

Answers

Answer:

18:18

Step-by-step explanation:

You first do 36-18 and then add your answer with the 18 to check it and correct it.

Please help! To determine the height of the CN Tower in Toronto, Ontario, Canada a person stands away from the base of the tower and measures the angle of elevation to the top of the tower to be 60°. After moving 118 meters closer to the tower, the angle of elevation to the top of the tower is 70°. A. How tall is the CN tower? B. How far was the person standing from the base of the tower when each angle measurement was taken?

Answers

Answer:

A right triangle is formed by the tower, a point 1000m from the tower

Use the tangent. let h = the height of the tower

tan(28.81) = h%2F1000

h = 1000 * tan(28.81)

h = 550 meters

Step-by-step explanation:

Joe wants to buy the new Air Jordans for $170. He has saved up $180 by plowing driveways. He knows that he will have to pay 7.5% tax. Will Joe have enough money to buy the sneakers?​

Answers

the sneaker with tax would be a total of 182.75. Take 170 and multiply it by .075 because of the 7.5% tax. That’s $12.75 of tax money that is added to the $170 for the shoes. NO HE WILL NOT HAVE ENOUGH.

Answer:

No

Step-by-step explanation:

This is because 7.5% of $170 is $12.75. If you add this to the original price of $170, then it will equal $182.75.

Lauren wants to build a model
airplane using a scale where 2 inches
represents 15 feet. If the airplane is
75 feet long, how long should the
model be?

Answers

Answer:

Step-by-step explanation:

you got this i believe in you!

Please help, thank you

Answers

I found 30

all I did was 125÷5 which is 25

and 1.2x25 which is 30

4 + x/7 =2

Solve

a -14. b 10. c 12 d 42​

Answers

Answer:

-14

Step-by-step explanation:

4 + x/7 =2

x/7= -2

x= -2 * 7

x=

-14

sorry but i have another question :| tysm all yall for helping meee ^w^

Answers

9514 1404 393

Answer:

4: {8, 12, 16, 24}7: {7, 42, 49}neither: {6, 11, 17}

Step-by-step explanation:

Looking at the numbers individually, we have ...

16 = 4×4

42 = 2×3×7

6 = 2×3

17 = 1×17 (prime)

12 = 3×4

49 = 7×7

24 = 2×3×4

7 = 1×7 (prime, a multiple of 7)

11 = 1×11 (prime)

8 = 2×4

__

Multiples of 4:

  16, 12, 24, 8

Multiples of 7:

  42, 49, 7

Multiples of neither:

  6, 17, 11

True or False:

cot = 1/tan

Answers

Answer:

I think its true??? right... its true

Step-by-step explanation:

Answer:

it is true

Step-by-step explanation:

Help! Plz!!!!!!!!!!!!!!!!!!!!!!

Answers

Answer:

girl literally I have the same thing omg

Answer:

What grade is this? Do you have to simplify or something?

Can y’all help me with this math problem please! I don’t understand

Answers

KL = 23

so you just have to add both of the segment lengths together.

each individual equation is already given in the image, so I'll substitute it out below:

JK + KL = JL

4x+2 +4x+3 = 45

8x + 5 = 45

8x = 40

x = 5

BUT WE'RE NOT DONE. plug in 40 for the variable X:

KL = 4(5) + 3

KL = 20 + 3

KL = 23

now i'll check my answer really quickly:

23 + 4(5) + 2 = JL

23 + 20 + 2 = JL

23 + 22 =

45

therefore, KL is 23

According to the Center for disease control, 15% of US adults are estimated to have a chronic kidney disease. A random sample of 150 US adults are selected. What is the probability that exactly 35 have chronic kidney disease

Answers

Answer:

[tex]P(X=35) =0.2\%[/tex]

Step-by-step explanation:

From the question we are told that

Sample space n = 150

Sample  percentage p = 0.15

Generally people without the disease in the set is give as X

[tex]X= 1-p[/tex]

[tex]X= 0.85[/tex]

35 have kidney disease,

[tex]P(X=35) = C(150,35)*(0.15)^35*(0.85)^115[/tex]

[tex]P(X=35) = 0.0021[/tex]

[tex]P(X=35) =0.2\%[/tex]

Hey guys I need help on question 38 and 39 please! :)

Answers

38. x=10
39. y=5

Hope this helps :)

HELP, WILL GIVE BRAINLIEST!!!!!!

What type of association is shown by the scatterplot?

linear, strong
linear, weak
nonlinear, strong
nonlinear, weak

Answers

that's a very hard one if i had to guess i'd say moderate linear but that's not an option so i'd say weak linear

Answer:

Non-linear, I believe its weak  

Step-by-step explanation:

You can see clearly that the lines are not tightly packed, and they arent making a line.

Let me know if you need more help! :)

Hope this helps!

Given z1 =9+9/3i and z2 = 2+/3i, what is z2-z1?


8+7/3i


-7-8/3i


7+ 10/3i


-7+ 10/3i

Answers

Answer:

z2 - z1 = 7/3i

Step-by-step explanation:

Given the following complex number:

z1 = 9+i/3i

z2 =  2+i/3i,

Taking the difference

z2 - z1 = 9+i/3i - (2+i))/3i)

z2-z1 = (9+i-(2+i))/31

z2 - z1 = 9+i -2-i/3i

z2-z1 = 9-2/3i

z2 - z1 = 7/3i

Note that the complex number given was not properly written and the ones used were assumed. Same procedure an be used for other complex numbers that might be given.

I NEED HELLLLPPPP:(((((

Answers

Answer: C. -1

Step-by-step explanation: -1 is your "a" value and is your leading coefficient.

Question Help
You invested $23,000 in two accounts paying 8% and 9% annual interest, respectively. If the total interest earned for the year was
$2040, how much was invested at each rate?
The amount invested at 8% is $
The amount invested at 9% is
Enter your answer in each of the answer hoxes

Answers

x + y = 23000

x.08 + y.09 = 2040

x = 23000 - y

(23000 - y) .08 + y.09 = 2040

1840 - .08y + .09y = 2040

Simplify

.01y = 200

Simplify

Y = 20000

X + 20000 = 23000

X = 3000

CHECK: .08x + .09(20000) = 2040

.08x + 1800 = 2040

Simply .08x = 240

X = 3000

Grocery Mart has cookies on sale for $3.84 for 12 cookies. Food Shoppe has cookies on sale for $5.70 for 19 cookies. Which store has a better deal on cookies?

Answers

Grocery mart:

12÷$3.84=3.125

Food Shoppe:19÷$5.70=3.333

so grocery mart is cheaper by

0.2075333333

Answer:

grocery mart has cookies on sale for $3.84 is a better deal

Step-by-step explanation:

Please help me with 47 and 48

Answers

Answer:

42. -1

48. 2

Step-by-step explanation:

Answer:

-1

2

Step-by-step explanation:

Elsa received a $70 gift card for a coffee store. She used it in buying some coffee that cost $8.69 per pound. After buying the coffee, she had $43.93 left on her
card. How many pounds of coffee did she buy?

Answers

Answer:

3

Step-by-step explanation:

70 - 8,69 - 8,69 - 8,69

You substracted it 3 times which means your answer is 3 pounds

A gardener measured the heights of two plants at the end of every week. The function y=3x+8.5 gives the hight of plant a in centimeters at the end of x weeks. The function y= 2.5x+14.5 gives the hight of plant b in centimeters at the end of x weeks

Answers

Answer:

12 weeks

Step-by-step explanation:

Step one:

given data

let the heights of the plants be y

and the number of weeks be x

Plant A

y=3x+8.5--------------1

Plant B

y=2.5x+14.5----------2

Required

The number of weeks taken for both plants to have the same height

,equate the two expressions above

3x+8.5=2.5x+14.5

3x-2.5x=14.5-8.5

0.5x= 6

divide both sides by 0.5

x= 6/0.5

x= 12 weeks

Can you guys please answer this it is due in 15 mins I really need help with all of them!

Answers

Answer:

3) is D

4)is A

5)

6)B

Step-by-step explanation:

hdhhdhdjd

2a) Solve using substitution.

y = 2

2x + 2y = 10

Explain how you got the answer please step by step

Answers

Answer:

3

Step-by-step explanation:

2x+2 x 2= 10

2x + 4 = 10

-4 -4

2x= 6

divide them by 2 to get x by itself

x=3

Ms. Taylor's checking account changes by-$1146 every year on her
electricity each year. How much does her account balance change per
month?

Answers

Answer:

-95.5

Step-by-step explanation:

if you do -1146 divided by 12 you get -95.5

??
The multiplicative verse of
(3x+5) 1/3

Answers

Answer:

tanother way of writing this is the cube root of3x+5

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