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
Vinil7 [7]
2 years ago
15

Find two numbers if their sum is 7.2 and their difference is 2.7

Mathematics
2 answers:
Klio2033 [76]2 years ago
8 0

Answer:

4.95 and 2.25

Step-by-step explanation:

x+y=7.2

x-y=2.7

Add equations

x+y + x-y= (2x-y+y)=2x

7.2+2.7=9.9

Therefore 2x=9.9 x=9.9/2=4.95

x=4.95

x+y=7.2

4.95+y=7.2

y=7.2-4.95=2.25

y=2.25

luda_lava [24]2 years ago
4 0

Answer:

4.95 and 2.25.

Step-by-step explanation: This is really long... (PLEASE TAKE NOTE THE INFO ISNT DIRECTLY WRITTEN BY ME).


Adding equations (1) and (2), we get

Therefore

x=4.95


Substituting value of x from (3) in (1), we get


y=2.25


From (3) and (4), the two numbers are 4.95 and 2.25.

You might be interested in
Also this question tooo pleease, PS: what topic is this <br> Solve for x.
MrRissso [65]

This falls under geometry. The two labeled angles are congruent, which means the line segment between them (AD in the image) is a bisector of the angle at vertex A. Use the angle bisector theorem, which says that

\dfrac{BD}{DC}=\dfrac{AB}{AC}\iff\dfrac{12}{(5+9x)-12}=\dfrac{15}{25}

\dfrac{12}{9x-7}=\dfrac35

20=9x-7

x=3

8 0
2 years ago
Show work <br> Need fast!!! <br><br> 4(1/3+ 1/3+ 1/3)
aalyn [17]

Answer:

4

Step-by-step explanation:

calculate the sum 4*1 any expression is multiplied by 1 remains the same solution is 4

7 0
3 years ago
Please help I’m struggling badly
Nady [450]

Answer:

yea bro should be the first one

Step-by-step explanation:

since the ratio is 5.5/5 we could scale it up to 11/10 and so f times that should be the amount of f used for every b that this girl used

4 0
2 years ago
Find the surface area of regular prism with height 6 cm, if the base of the prism is a Regular quadrilateral with side 4 cm.
marshall27 [118]
A "regular quadrilateral" is a square, so the length and width are both 4 cm. The surface area of a rectangular prism is given by
  S = 2(LW +H(L +W))
  S = 2((4 cm)*(4 cm) +(6 cm)*(4 cm +4 cm))
  S = 2(16 cm² +48 cm²)
  S = 2*64 cm² = 128 cm²

The surface area of the prism is 128 cm².


6 0
2 years ago
If a quadratic function has x-intercepts at (-7,0) and 10,0), where would
madam [21]

Answer:

x = 1.5

Step-by-step explanation:

Since the axis of symmetry is between the 2 x intercepts, we can find it by finding the average of the x-coordinates of the 2 points.

(-7 + 10) / 2

3/2

= 1.5

So, the axis of symmetry is at x = 1.5

8 0
2 years ago
Other questions:
  • One million four hundred ninety-six thousand seven hundred seventy -two in standard form
    7·2 answers
  • I need help . Top left corner
    8·1 answer
  • An artist uses 49.4 centimeters of decorative molding to make a square picture frame
    6·1 answer
  • Shania is making eight gift bags to give out to her friends coming over to her house for a movie night. Each gift bag will conta
    13·2 answers
  • Type the correct answer in the box.
    12·1 answer
  • Assume that the probability of any newborn baby being a boyboy is one half 1 2 and that all births are independent. if a family
    14·1 answer
  • SOMEONE PLEASE HELP!!!!
    6·2 answers
  • Please answer correctly !!!!!!!!! Will mark Brianliest !!!!!!!!!!!!!!
    13·1 answer
  • Determine whether the systems have one solution, no solution, or infinitely many solutions. 3x-2y=3; 6x-4y=1
    14·1 answer
  • Writing an Equation from a Graph
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!