Mathematics High School

can someone please help ​

Can Someone Please Help

Answers

Answer 1

Answer:

x=3, y= - 2

Step-by-step explanation:

4x + 3y = 6

x-3y= 9

x=9+3y

4.(9+3y)+3y=6

36+12y+3y=6

15y = - 30

y = - 2

=> x= 9+3y

x= 9+ 3.(- 2)

x= 3

Answer 2
x-3y=9
x=3y+9
4(3y+9)-3y=9
12y-3y+36=9
9y=-27
y=-3
x-3(-3)=9
x+9=9
x=0
(0,-3)

Related Questions

7x + y = 7
y = [ ? ]x+ []

Answers

y=-7x+7

hope this helped!

WILL GIVE BRAILIEST PLZZZZ HELP MEEEEEE
A teacher surveyed her class after they had taken a vocabulary test. Eighteen of the students claimed they had studied at least one hour for the test. The remaining twelve students admitted that they had not studied for the test at all. The test results (expressed as a percent) for the two groups are shown below.

Studied: 88, 100, 94, 79, 92, 100, 95, 83, 89, 99, 100, 91, 89, 95, 100, 93, 96, 84

Did Not Study: 82, 72, 45, 91, 58, 83, 65, 87, 90, 77, 73, 89

Which of the following statements are true?

There is no mode of the group that studied.
In general, those students that studied scored much higher than those students that did not study.
The mean of the group that studied is over 15 percentage points higher than the mean of the group that did not study.
The median of the group that studied is over 95.
The median of the group that did not study is less than 80.

Answers

Answer:

In general, those students that studied scored much higher than those students that did not study.

Step-by-step explanation:

Hope this helps.

The median of the group that did not study is less than 80.

also

In general, those students that studied scored much higher than those students that did not study.

can someone help :)) and pls explain how u got it so i can understand

Answers

Answer:

B) x = 20

Step-by-step explanation:

The formula for finding the missing side of a right triangle is: a^2+b^2=c^2.

C represents the longest side of the right triangle, so if we plug in the given lengths, we can solve: 12^2 + 16^2 = x^2

Solve the exponents: 144 + 256 = x^2

Add: 400 = x^2

Find the square root: 20 = x

**8. At a buffet restaurant, the price for dinner for an adult is $6.95 and the price for dinner for a child is $3.95. A
group of 8 people went to the restaurant for dinner and paid a total of $46.60, excluding tax and tip. How many
adults were in the group?
A.2
B.3
C.4
D.5

Answers

Answer is A

Step-by-step explanation:

Savannah is 9 years older thanDevante. The sum of their ages is 53. How old are Savannah and Devante?
(A) First write an equation you can use to answer this question. Use x as your variable.
The equation is _______
Answer: Devante is _______
and Savannah is ______

Answers

Answer:

Devante is 23 and Savannah is 32.

Step-by-step explanation:

We can set up a system of equations.

s - savannah's age

d - devante's age

s = d + 9

s + d = 53

Now we can substitute (d + 9) for s in the second equation.

(d + 9) + d = 53

2d + 9 = 53

2d = 46

d = 23

To find Savannah's age, we just add 9 to Devante's age. (plugging in 23 for d)

23 + 9 = 32

s = 32

Jill sold 478 out of 520 tickets to the opening night of her theater performance. What portion of the tickets did she sell?

Answers

Answer:

write your answer as a decimal, then round

Help geometry hw will give brainliest

Answers

Answer:

34 degrees

Step-by-step explanation:

Angle K is similar to Angle R, and Angle R is 34 degrees. So Angle K is also 34 degrees.

Hope it helps!

Complete the following ratio table so that each pair represents the same rate.
1
5
2
10
3
15
4
20
5
25

Answers

51 so I hope that help you in the long turm

Answer:

Step-by-step explanation:

what is the prime factor of 350

Answers

Answer:

If we put all of it together we have the factors :2 x 5 x 5 x 7 = 350.

Step-by-step explanation:

It can also be written in exponential form as 21 x 52 x 71.

Hope this is helpful .

Answer:

Step-by-step explanation:

draw the prime factor tree of 350

you can choose any 2 numbers that equals 350, then continue in that way by choosing any 2 numbers that equals the number that's on top of the 2 other numbers when multiplying, except 1×number, because it won't help you to get the prime factors of a specific number, unless it's a prime number so you don't need to multiply by any number

                                                             350

                                                     35             10

                                                 5        7       2     5

350=2×5×5×7

                                                 

                                                       

PLSSSSSS HELP ME LAST ATTEMPT AND THIS IS MY LAST QUESTION ILL MAKR BRAINLIEST.
Which set of side lengths form a right triangle?


7 cm, 8 cm, 10 cm

3 ft, 6 ft, 5 ft

14 m, 20 m, 25 m

10 cm, 6 cm, 8 cm

Answers

Answer:

D.) 10cm, 6 cm, 8 cm

Step-by-step explanation:

I jus kno

A triangular prism has a base edges 2cm, 4cm, and 5cm long. It’s lateral area is 231cm . What is the height of the prism

Answers

Answer:

For your specific problem, h = 300 / (4 + 5 + 6) = 300 / 15 = 20

due today plzzz help

Answers

The sequence is + 1/4 on each number. So, 1/4, 1/2, 3/4, 1 1/4, etc.

Answer:

Increasing

Step-by-step explanation:

1/4 = .25

1/2 = .50

3/4 = .75

Given the following functions, find the indicated values.
f(x) = 9 - 3x
(a) f(-4) (b) f(0) (c) f(2)

Answers

Answer:

hope it helped have a good day mate

-3x-y=9
y=-3x+9
(select the correct answer for the solution to the following system of equations)
A: (1,6)
B: (0,-9)
C: infinite solutions
D: no solution

Answers

Answer:

D: no solution

...because none of the answers work for both of the equations when you plug in the x and y values

I need help asap!!!!!!!!

Answers

Answer:

42

Step-by-step explanation:

in order to find y, we need to find x.

180-65-62=53

x=53

we need to subtract 53-?=11

53-42=11

y=42

Answer:

42

Step-by-step explanation:

because the triangles are congruent, we can place the angle x in CDE to solve for it. Knowing the sum of all angles in a triangle is 180, we can set up the formula below.

62 + 65 + x = 180

Additionally, because the triangles are congruent, we know that the length of CD is equal to GH, letting us set up this formula:

x - y = 11

Solving the first formula, we now know the value of x, 53.

62 + 65 + 52 = 180

Plugging that into the second formula and solving, we get 42.

53 - 42 = 11

Rosemarie made a necklace from materials that cost $30. She is going to sell the necklace to Betty at 390% of this cost. About how much should Betty pay for the necklace?
А
$12,000
B
S1,200
C$120
DS12

Answers

The anger to how much will Rosemarie sell the necklace for is c $120

Answer: 12

Step-by-step explanation:

Complete the conversion. Enter your answer in the box. 7 c = pt

Answers

Answer:

7 cups = 3.5 pints

Step-by-step explanation:

The value of k for which x²-4kxy+4y²=0 represent a pair of straight is?​

Please help me!!

Answers

Answer:

k=1    k= -1

Step-by-step explanation:

hello :

here is an solution

A 747 Airplane is 762 inches tall. How tall is it in feet

Answers

Answer:

The answer is 63.5 feet :)

the airplane is 63.5 feet tall when converted from inches to feet

what is k + 1 3 = 5 1/8

Answers

The answer is k=-63/8

Solve the equation.

2.5p = 25

Answers

2.5 x 10 = 25
Because P = 10

Student Council held a bake sale to raise money for the local food pantry. They sold a total of 40 items which included pies and cakes. Pies were $10 each and cakes were $8 each. They raised $356. How many pies and how many cakes did they sell?

Answers

Answer: 18 pies, 22 cakes

Step-by-step explanation:

Let the number of pies sold be represented by p.

Let the number of cakes be represented by c.

The information in the question can then be represented in an equation as:

p + c = 40 ........ i

10p + 8c = 356 ....... ii

Multiply equation i by 10

Multiply equation ii by 1

10p + 10c = 400 ....... iii

10p + 8c = 356 ....... iv

Subtract iv from iii

2c = 44

c = 44/2

c = 22

22 cakes were sold

Since 40 items were sold, the number of pies sold will be:

= 40 - 22

= 18 pies


Find the volume of a sphere that has a diameter of 30 feet. Use 3.14 for pi.

Answers

Umm the answer I’m pretty sure is the diameter 5.346 and 30 feet divide that by 30

Can someone like help with this pleasee

Answers

Answer:

this is as test

Step-by-step explanation:

I REALLY NEED HELP PLEASE
Frank is building a house. He is using plans an architect gave him. The house will be a dilation of these blueprints, using a scale factor of 100. A room measures 0.1 ft by 0.12 ft on the blueprints. How area of floor will he need to buy?
A) 120 square feet
B) 0.44 ft
C) 0.012 square feet
D) 44 ft

Answers

I think the answer is letter B

The front of a vacation cottage is an equilateral triangle with a base of 44 feet. What is the height
x of the cottage above its foundation?

Answers

Answer:

Step-by-step explanation:

(2x+4)(x-2)
please help

Answers

Answer:

2x squared - 8

Step-by-step explanation:

For this kind of equation, we use the distributive property

So in the image below I used a box method (that's how I learned it in school)

So since -4x and 4x cancel each other out, or amount to 0, we don't put anything for those. So the equation left is 2x squared - 8

The location of three fish relative to the water's surface are -10 feet -3 feet, and -12 feet. Which number has the least absolute value?

Answers

Absolute value is the value despite the positive or negative part. If I have -10 and -3 and -12, the absolute values are 10, 3 and 12. Which one out of those three numbers is the least? The answer is 3.

To
357 is what percent of 420?

Answers

Answer:

85

Percentage Calculator: 357 is what percent of 420? = 85.

Answer:

85%

Step-by-step explanation:

357/420 reduces to 17/20 if you divide the numerator and denominator by 21 which is equivalent to .85

please help me will give you brainliest

Answers

Yes no yes yes. That is the answer
1: (yes)
2: (yes)
3: (no)
4: (no)
Other Questions
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