Mathematics Middle School

solve these equations

Solve These Equations

Answers

Answer 1

Answer:

first one=8

second one= -4

third one= -5a

Answer 2

Answer: 8 , -4 , -5a

Related Questions

The area of a triangle is 18 square feet. If the base is 3 feet, what is the height of the triangle?

3 feet
9 feet
6 feet
12 feet

Answers

Step-by-step explanation:

12 feet is true.......

Answer:

12 feet

Step-by-step explanation:

can you help me plz
and thank you

Answers

Honestly I don’t know this one but I think it’s like you start at 35 on the number line then you subtract 4 then add 2 then subtract 5. So I think it’s B but I’m not sure.

Can you help me with my math

Answers

I can help if you want me to

AHHHHHHHHHHHHHHHH

Use cubes with an edge length of 1/2 inch to build prisms with the lengths, widths, and heights shown in the table.

Answers

Answer:

3/2, 5/2, 7/2, 10/2, 15/2, 14/2, 23/2

Step-by-step explanation:

Don't use last answer if you don't have to.

1.  = 3/2 cubes =1 1/2

2. = 5/2 = 2 1/2

3. = 7/2 = 3 1/2

4. = 10/2 = 5

5. = 15/2 = 7 1/2

6. = 14/2 = 7

7. = 23/2 = 11 1/2

Help plsssssssssssss

Answers

Answer:

a- 6

b-6.25

b is a better deal by .25 cents

Step-by-step explanation:

PLEASE HELP THIS IS DUE AT 11:59!!!
1. Which is an example of the associative property?

A. x + 5 = 5 + x
B. (x + 3) + 7 = x + (3 + 7)
C. 3 • (x + 5) = 3 • x + 15
D. If x = a, and a = 7, then x = 7.

2. Which is an example of the distributive property?
9 • (t + 5) = 9t + 45
9 • (t + 5) = (t + 5) • 9
9 • (t + 5) = (9 • t) + 5
9 • (t + 5) = 9t + 5

3. Identify the property shown
transitive
associative
commutative
distributive

4. Which property justifies this statement?
2 + (8 + 9) = (2 + 8) + 9
transitive
commutative
distributive
associative
..........................................................................
5. Which property is shown?
–7 + 0 = –7
A. distributive property
B. associative property of multiplication
C. commutative property of addition
D. identity property of addition

Answers

Answer:

do you still need help?

Step-by-step explanation:

Tim pays $22.10 for 2.6 pounds of salmon. What is the price per pound of the salmon?

Answers

Answer: $8.50

Step-by-step explanation:

Divide $22.10 by 2.6

Answer is 8.50 dollara

1. The length of a rectangle is six less than three times the width. If the perimeter is 76, find the area of the
rectangle.

Answers

6 - w3 =6 is the answer
6-w3=6 is the answer, hopefully this helps

40% of farm animals are cows. 72 animals are not cow. How many animals in all?

Answers

Answer:

112 maybe.

Step-by-step explanation:

Answer:

115

Step-by-step explanation:

got it right on test

A student is standing 20 feet away from the base of a tree. He looks to the top of the tree at a 50° angle
of elevation. His eyes are 5 feet above the ground. Using cos 50° 0.64, what is the height of the tree
to the nearest foot?

36 feet
29 feet
24 feet
31 feet

Answers

Answer:

[tex] \tan(50) =opp(x) \div adh(20) \\ \tan50 \times 20 = opp(h) \\ = 23.8 [/tex]

therefore the answer is 24

The height of the tree is approximately 26 feet.

What are trigonometric identities?

There are three commonly used trigonometric identities.

Sin x = Perpendicular / Hypotenuse

Cosec = Hypotenuse / Perpendicular

Cos x = Base / Hypotenuse

Sec x = Hypotenuse / Base

Tan x = Perpendicular / Base

Cot x = Base / Perpendicular

We have,

Let's denote the height of the tree with 'h'.

Then we can use the trigonometric ratio for cosine as follows:

cos(50°) = adjacent/hypotenuse

cos(50°) = 20/h + 5 (the adjacent side is the distance from the student's eyes to the tree, which is 20 feet, and the hypotenuse is the height of the tree plus the height of the student's eyes, which is h + 5 feet)

Now we can solve for 'h':

0.64 = 20/(h + 5)

0.64(h + 5) = 20

0.64h + 3.2 = 20

0.64h = 16.8

h = 26.25

So the height of the tree is approximately 26 feet (rounded to the nearest foot), which means the closest answer choice is 29 feet.

Therefore,

The height of the tree is approximately 26 feet.

Learn more about trigonometric identities here:

https://brainly.com/question/14746686

#SPJ7

Question is below pls helppp

Answers

Answer:

Sale Tax : 6.00% or $4.20.

Step-by-step explanation:

Hope it helps!

Answer:

4,200

Step-by-step explanation:

?/70,00 = 6\100

6×70,00=420,000

420,000 divided by 100= 4,200

help me out this is due at midnight along with like 10 other assignments

Answers

A) y=1/2x+3 and y-1/2x=3
B)y=-4 ( for both forms)
C) y=3/4x+2 and y-3/4x=2
D)y=3x-5 and y-3x=-5
Here are the answers along with the work on how i got the answers so you can understand the topic better :)

I dont get this math work sheet my teacher give me so can you guys help me

Answers

Answer:

1.) y= -1/3x+3

2.) y= 3x-2

3.) -1/2x+0

Step-by-step explanation:

slope intercept

I need help with my math rq I said Karen was closets but I am not sure

Answers

Answer:

Scott is closer

Step-by-step explanation:

8×68=524

524-480=44

560-524=46

hope it helps

Sarah has all of the letters for the word WATERMELON in a bag. She chooses one letter, KEEPS it, then chooses another letter. What is the probability that she will choose the letter A and then the letter W?

1/9
1/18
1/90
2/9

Answers

Answer:

2/9

Step-by-step explanation:

need help asap, please
will give brainly

Answers

Answer:

I don't remember how to do them but i hope this helps

Step-by-step explanation:

Moves down 5 space on the y-axis and rotates clockwise 180%

what's the answer will give brainliest

Answers

Answer:

2.964

Step-by-step explanation:

Answer:

2.964

Step-by-step explanation:

4 - 1.036= 2.964

Solve for x:

− 10x + 4 = − 7x − 14 −7x −14


PLEASE HELP ME!

Answers

Step-by-step explanation:

-10x + 4 = -7x - 14 - 7x - 14

-10x + 4 = -14x - 28

4x = -32

x = -8.

just by using distributive property i got x=-8

Does each equation represent a proportional relationship? Choose Yes or No.
y = 7x – 3
Choose...Yes or no

y = 150x
Choose...Yes or No

Answers

Answer:

the first one yes the other on e not sure

Step-by-step explanation:

Answer: yes and no

Step-by-step explanation:

1. Is the graph proportional?

2. How many feet can a sloth travel in 20 minutes?

Answers

Answer:

1. Yes

2. 60

Step-by-step explanation:

The graph is proportional because it passes an origin point.

The equation of the graph is

[tex]y = 3x \: \: (x \geqslant 0) \: \: (y \geqslant 0)[/tex]

We can find the distance when travelling in 20 minutes by substituting x = 20 in the equation.

[tex]y = 3(20) \\ y = 60[/tex]

Therefore the distance (ft) is 60.

Find the LCM for 6 and 8

Answers

Answer:

24

Step-by-step explanation:

The LCM of 6 and 8 is 24 because 24 is the smallest number that is both a multiple of 6 and a multiple of 8

Answer:

2

Step-by-step explanation:

To find the least common factor....

Let's list the factors of each number

6: 1, 2, 3, 6

8: 1, 2, 4, 8

So in this case, the '2' is common and the least (after 1 ofc but 1 doesn't count)

Hope this helps :D

Plz help I don’t understand

Answers

Answer: I think it's "47.6 ÷ 3.9" and maybe "71.9 ÷ 6.5"

Step-by-step explanation: It's asking for you to put the boxes that have an estimated answer of 12 in the big box at the bottom. I hope this helps.

I did the math and yes it’s correct

ill give brainliest to who ever answers these questions first

Answers

high blood pressure, high cholesterol, and smoking.
Increasing age,high blood pressure, physical inactivity, obesity...hope this helps!!

Help me with this math

Answers

Answer:

x= 35° hope this helps!!!

Answer: 35°

Step-by-step explanation: the total of a triangle's angles always equals 180° and we know 2 of the angles so if you add the two (55+90=145) and subtract that from 180 (145-180=35) you get 35°

Need help ASAP:)))))))))))))
Pls show ur work!
1.2x + 7 - 5x

2.2c - 3 = 2(6 - c) + 7c

Answers

Answer:

c = -75/14 OR c = -5.357143

Step-by-step explanation:

Simplify both equations:

1.2x + 7 - 5x =

-3.8x + 7

2.2c - 3 = 2(6 - c) + 7c =

c = −5.357143

OR

c = -75/14

The question wasn't quite clear, if this wasn't correct, please elaborate on what needed to be solved, and I'll fix my answer.

Hope this helped!

have a good day :)))

Help with math I need, do not understand I do (yoda speech) lol.

Answers

It’s the purple one!
The correct answer is A.
This triangle is considered an acute triangle because all the angles are under 90 °

Is the domain less than 2 or greater than 2?




less than or
greater than

Answers

The domain is less than

PLEASE HELP.Ill mark you brainliest if its right

Answers

Answer:

Step-by-step explanation:

1.) y= 1/5x - 2

2.) y = 1x + 2

3.) y = 2x + 4

4.) y = 1x + 4

5.) y = 1/3x - 4

6.) y = 1/2x - 3

1) y=1/5x-2
2) y=-1x+2
3)y=-7/3x+4
4) y=-1x+4
5)y=1/3x-4
6)y=-1/2x-3
Not sure about the last one cuz the line is a little off

can i pls get help on wat 2x - 3 = 15?

Answers

Answer: x = 9

Step-by-step explanation:

Step 1: Add 3 to both sides.

2x − 3 + 3 = 15 + 3

2x = 18

Step 2: Divide both sides by 2.

2x/2 = 18/2

x = 9

The answer is 9.

You’d move all terms that don’t contain x to the right side and solve it.

A plane leaves at 11:22 a.m. and arrives at 3:13 p.m. how long was the flight?

A. 3 hours 51 minutes

B. 3 hours 35 minutes

C. 14 hours 35 minutes ( I know its not this one lol)

D. 4 hours 35 minutes

E. 8 hours 9 minutes

Answers

D should be the answer

Answer:

3 hours and 51 minutes

Step-by-step explanation:

Let's take this one hour at a time. Add three hours to 11:22, and you will get 2:22. There are 51 minutes between 2:22 and 3:13. So your answer will be 3 hours and 51 minutes.

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