1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
madam [21]
3 years ago
5

Help me out not all just what you can

Mathematics
1 answer:
lara31 [8.8K]3 years ago
6 0

9514 1404 393

Answer:

  1e. 2t² +8t -6

  2h. a² +2ab -3b²

  3b. 8r +4

  4b. 6x +4y -11

  5b. e -3

Step-by-step explanation:

1e. Combine like terms.

  (3t² +3t -6) +(-t² +5t) = t²(3 -1) +t(3 +5) -6

  = 2t² +8t -6

__

2h. (2a² +3ab -4b²) -(a² +ab -b²)

Use the distributive property to eliminate parentheses. Note that all signs change in the second set of parentheses.

  = 2a² +3ab -4b² -a² -ab +b² = a²(2 -1) +ab(3 -1) +b²(-4+1)

  = a² +2ab -3b²

__

3b. The hash marks indicate sides of the same length. The perimeter is the sum of all side lengths.

  P = (4r -2) +2(2r +3)

  P = 4r -2 +4r +6 . . . . . . eliminate parentheses

  P = 8r +4 . . . . . . . . . . . . combine like terms

__

4b. (3x +4y) +(5x -8) -(2x +3)

Note that the distributive property changes the sign of all terms in the last parentheses.

  = 3x +4y +5x -8 -2x -3 . . . . eliminate parentheses

  = x(3+5-2) +y(4) +(-8-3) . . . group like terms

  = 6x +4y -11

__

5b.

  Bill's age - Erin's age = (2e-3) -(e) = e -3

The difference in their ages is (e -3).

You might be interested in
Paulina swims 5 miles down a creek with a current for 2 hours. It takes her 4
Westkost [7]

Answer: her swimming speed = 1.875 mph

Speed of current = 0.625 mph

Step-by-step explanation:

Let x represent her swimming speed.

Let y represent the speed of the current.

Paulina swims 5 miles down a creek with a current for 2 hours. Since this is faster, it means that she swam with the current. Her total speed would be (x + y) mph

Distance = speed × time

Therefore,

5 = 2(x + y)

dividing both sides by 2, it becomes

2.5 = x + y- - - - - - -1

It takes her 4 hours to swim the same 5 miles back to her original destination against the

same current. It means that her total speed was (x - y) mph

Distance covered would be

5 = 4(x - y)

Dividing both sides by 4, it becomes

1.25 = x - y- - - - - - - 2

Adding equation 1 to equation 2, it becomes

3.75 = 2x

x = 3.75/2

x = 1.875

Substituting x = 1.875 into equation 1, it becomes

2.5 = 1.875 + y

y = 2.5 - 1.875

y = 0.625

4 0
3 years ago
Which ordered pair is a solution to this equation? 5x - 10y = 35 (7, 1) (1, -3) (8, -4) (-2, 6)
Nataly_w [17]
(1,-3) is the anwser
7 0
3 years ago
Fatima has made a planter box that is 2.5 feet long, 1.5 feet wide, and 2 feet high.
earnstyle [38]

Answer:

Bottom right

First you multiply the bottom (2.5 x 1.5) to get 3.75. Then multiply 3.75 by 2 to got 7.5.

Whole equation: (2.5 x 1.5) x 2.0 = 7.5

3 0
2 years ago
I’m confused on this question and i really need help , can someone please help
Anton [14]
Add all of them and them subtract by the value
8 0
3 years ago
Read 2 more answers
if triangle ABC is an isosceles triangle and triangle DBE is an equilateral triangle, find each missing measure
BabaBlast [244]

Picture?? This question is incomplete just get a picture then I can answer it



6 0
3 years ago
Other questions:
  • Write the sum as a product. simplify the product (-2)+(-2)+(-2)+(-2)
    7·2 answers
  • How do you solve square root problems<img src="https://tex.z-dn.net/?f=%2012%20%5Csqrt%28%20-10%29%5E12%20" id="TexFormula1" tit
    10·1 answer
  • Plz solve
    9·2 answers
  • A praying mantis can grow up to 15 centimeters long. How long is this in millimeters
    8·2 answers
  • A laboratory tested 85 chicken eggs and found that the mean amount of cholesterol was 190 milligrams. Assume that the sample sta
    13·1 answer
  • Convert 3cm to inches
    14·1 answer
  • С<br> (2x + 19)<br> (3х + 8)<br> А
    12·1 answer
  • a professional tennis court is a rectangle that is 120 feet long and 60 feet wide. what is the area of the court? what is the pe
    11·1 answer
  • Some body is there in room.​
    13·1 answer
  • Rewrite the mixed number 2 4/5 as a improper fraction
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!