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
Mademuasel [1]
2 years ago
14

Five times a number decreased by nine is equal to twice the number increased by 23. Which equation could be used to solve the pr

oblem?
Rachna has nickels, dimes, and quarters in her piggy bank. She has $4.65 altogether. She has three more quarters than dimes and twice as many nickels as quarters. How many quarters does Rachna have?

Three times a number, x, increased by four is equal to five times the number, x. Which equation can be used to solve for x?

What is the value of x in the equation 0.2(x + 1) + 0.5x = –0.3(x – 4)?
Mathematics
2 answers:
Galina-37 [17]2 years ago
6 0

Answer:

Part 1) 5x-9=2x+23

Part 2) 11\ quarters

Part 3) 3x+4=5x

Part 4) x=1

Step-by-step explanation:

Part 1)

Let

x-----> the number

The expression" Five times a number decreased by nine is equal to twice the number increased by 23", is equal to the algebraic expression

5x-9=2x+23

Part 2) we have that

1\ nickel=\$0.05

1\ dime=\$0.10

1\ quarter=\$0.25

Let

x------> the number of nickels

y-------> the number of dimes

z-------> the number of quarters

0.05x+0.10y+0.25z=4.65

Multiply by 100 both sides

5x+10y+25z=465 ------> equation A

z=3+y -----> isolate the variable y

y=z-3 ------> equation B

x=2z ------> equation C

substitute equation B and equation C in equation A

5(2z)+10(z-3)+25z=465

10z+10z-30+25z=465

45z=465+30

45z=495

z=11\ quarters

Part 3) we know that

Let

x------> the number

The equation that represent the expression is equal to

3x+4=5x

Part 4) we have

0.2(x+1)+0.5x=-0.3(x-4)

Multiply by 10 both sides

2(x+1)+5x=-3(x-4)

2x+2+5x=-3x+12

7x+3x=12-2

10x=10

x=1

kotegsom [21]2 years ago
4 0
The first one is 5x-9=2x+23

The third one is 3x+4=5x
You might be interested in
Find s(2t - 4) for s(t) = 3t - 7 <br> A)6t - 19 B) 6t - 18 C) 5t - 11 D) 5t - 19
asambeis [7]
Hello,

Answer A

s(x)=3x-7
s(2t-4)=3*(2t-4)-7=6t-12-7=6t-19
3 0
3 years ago
Given the functions f(x)= 1/x−4 +3 and g(x)=1/x+1 +6 .
melomori [17]

ANSWER

The graph shifts 5 units left and 3 units up.

EXPLANATION

The given functions are:

f(x) =  \frac{1}{x - 4}  + 3

and

g(x) =  \frac{1}{x + 1}  + 6

We want to transform f(x) so that, it coincide with the g(x).

The required transformation is

f(x+5)+3

Let us see why this works.

f(x+5)+3 = \frac{1}{x + 5- 4}  + 3 + 3

f(x+5)+3 = \frac{1}{x + 1}  + 6 = g(x)

The transformation f(x+5)+3 will shift f(x) 5 units left and 3 units up.

The third choice is correct.

7 0
2 years ago
Read 2 more answers
Liam’s is punting a picture she has green
Natali5045456 [20]
That makes no sense at all!!!
7 0
3 years ago
What is DA equal to? Brainiest if correct and please show your answer.
Naddik [55]

Answer:

<h2>DA is equal to <u>25</u> or BA</h2>

Step-by-step explanation:

ABC

ADC

  1. Since we know that line CA is equal to line CA because of <em>reflexive property</em>
  2. Angle BAC and DAC are equal because of <em>definition of an angle bisector</em>
  3. Angle ABC and ADC are equal because of <em>definition of an angle bisector</em>
  4. This will give us <em>ASA</em>, proving to us that all sides and angles are congruent <u>(this was already given to us)</u>
  5. So, if BA is 25, and we know that BA is congruent to DA, this tells us that DA is 25

5 0
1 year ago
If sin A= 0.8, find the positive value of cos A​
Ahat [919]

Answer:

cosA = 0.6

Step-by-step explanation:

Using the Pythagorean identity

sin²A + cos²A = 1 ( subtract sin²A from both sides )

cos²A = 1 - sin²A ( take the square root of both sides )

cosA = ± \sqrt{1-sin^2A

Since only the positive value is required , then

cosA = \sqrt{1-(0.8)^2}

         = \sqrt{1-0.64}

         = \sqrt{0.36}

         = 0.6

6 0
3 years ago
Read 2 more answers
Other questions:
  • 2/3n=4n-10/3n-1/2 <br>can you show me how to do it step by step please
    5·1 answer
  • Find the common solution by graphing <br> 2x+y&gt;3 <br> x&lt;1<br> Please help!!!
    10·2 answers
  • maria works as a florist and worked for 8 hours last week and earned 98$ at that rate how much will she earn this weekend if she
    9·2 answers
  • Pls help me with this dilation.
    7·1 answer
  • Rewrite the expression as an equivalent expression that does not contain powers of trigonometric functions greater than 1.
    15·1 answer
  • A cylinder has diameter of 4ft and a height of 9ft. Explain whether halving the diameter has the same effect on the surface area
    7·1 answer
  • Sarah competes in a long jump competition.
    8·1 answer
  • Somebody help me with this <br><br> 30 points ☺️
    9·1 answer
  • Solve: -8-5/3x=17<br><br> i just need the answer fast
    10·2 answers
  • Which figure has no lines of symmetry?
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!