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
e-lub [12.9K]
3 years ago
8

Please help me!! Very important

Mathematics
2 answers:
melomori [17]3 years ago
6 0
Hello,
Let x represent the total of jumps
y represent the total “ raised the roof "

Here are two equation:
3x+2y=50
x+y=19
To solve this, I would prefer to use substitution because it is the easiest way to do:
x+y=19
Times 3 from both side
3x+3y=57
-
3x+2y=50
=
y=7
x=19-7=12. As a result, Roxanne jumps 12 , and “ raised the roof ” 7 times. Hope it help!
givi [52]3 years ago
3 0
3x+2y=50
x+y=19
x=12, y=7
12 jumps, 7 "raise the roof"s
You might be interested in
Matthew is 7 years older than twice the age of his sister. If Matthew is 13, how old is his sister?
Iteru [2.4K]
Let sister be s.  Matthew, M

Matthew is 7years older than twice the age of his sister

M = 7 + 2s

13 = 7 + 2s.   7 crosses the equality to other side and becomes -7

13 - 7 = 2s

6 = 2s    Divide both sides by 2

6/2 = 2s/2

3 = s

Sister is 3 years old.
8 0
3 years ago
Read 2 more answers
Which graph shows the solution to the system of linear inequalities? x – 4y < 4 y < x + 1 Image for option 1 Image for opt
slava [35]

Answer:

The graph in the attached figure

Step-by-step explanation:

we have

x-4y ----> inequality A

solve for y

-4y

4y>x-4

y> (x/4)-1

The solution of the inequality A is the shaded area above the dashed line

The slope of the dashed line is positive

The y-intercept is the point (0,-1)

The x-intercept is the point (4,0)

y< x+1 ----> inequality B

The solution of the inequality B is the shaded area below the dashed line

The slope of the dashed line is positive

The y-intercept is the point (0,1)

The x-intercept is the point (-1,0)

Using a graphing tool

The solution of the system of inequalities in the attached figure

7 0
3 years ago
Here are two polygons on a grid. Is PQRST a scaled copy of ABCDE?
Bezzdna [24]

*see attachment showing the two polygons in a grid.

Answer:

No, PQRST is not a scale copy of ABCDE because we the sides are not increased proportionally.

Step-by-step explanation:

A polygon can be said to be a scaled copy of another polygon, if the the same scale factor is used in scaling every segment of the preimage or original image to get the length of the corresponding segments of the scale copy or image. In order words, all segments must be scaled proportionally.

Polygon PQRST, which is the new image, has different scale factors used in scaling the various segments of the preimage. In simple terms, the sides of PQRST were not increased proportionally. Therefore, PQRST is not a scaled copy of ABCDE.

5 0
3 years ago
What formula would you use to calculate the mass of fermium-253 remaining after d days? f(d)=400(0.833)d f(d)=400(0.794)d f(d)=4
seraphim [82]

Answer:

f(d)=400(0.794)^d

Step-by-step explanation:

4 0
3 years ago
Some know hit me asp❗️
nekit [7.7K]
10 x 15 divided by 4
6 0
3 years ago
Read 2 more answers
Other questions:
  • 6/7 divided by 1 2/5
    5·1 answer
  • 15. The equation of a circle is x +
    14·1 answer
  • what is the difference in there elevation an airplane flies at an altitude of 25,000 feet a submarine dives to a depth of 600 fe
    9·1 answer
  • An object with a starting velocity of 15 m/s accelerates at 3 m/s2. How far does the object travel within 10 seconds?
    6·1 answer
  • PLEASE HELP ASAP, FIRST PERSON ANSWERS WILL GIVE BRAINLIST WILL GIVE 20 PTS
    7·2 answers
  • A SCHOOL IS PLANNING A FIELD TRIP. THERE ARE A TOTAL OF 611 STUDENTS AND 91 SEATS ON EACH BUS. HOW MANY BUSES ARE NEEDED TO TAKE
    9·1 answer
  • Can someone help please??
    7·1 answer
  • Help me please, not very good at math. Thank u:)
    5·2 answers
  • Discriminant 9v^2+v+5=0
    5·1 answer
  • Find the angle measures. Justify your responses. Given: a||b, m1=71º Find m5, m8
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!