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
nignag [31]
4 years ago
7

Grade 7 Need help with proportions (PICTURE INCLUDED)

Mathematics
1 answer:
jeka57 [31]4 years ago
4 0
What you are doing with proportions most the time is solving for a variable which in this example I will use an x. You have to do something called cross multiplying. now look at number 21. when you cross multiply you multiply the number of the top part of the fraction on the left side to the bottom part of the fraction on the right side. In that example 1 × 36 = 36. now write 36 = 16x since you have to cross multiply the other parts of the fraction. Then you would divide both sides of the equation by 16. I will make a mixed fraction for this example. 2 4/16 which simplified equals 2 1/4
You might be interested in
Write an exponential function of the form y=ab^x whose graph passes through the given points.
umka21 [38]
We\ substitude\ points\ into \ formula:\\ y= ab^{x}\\\{ {{4=ab^1} \atop {12=ab^2}} \right.  |Substitude\ a= \frac{4}{b} \ from\ first \ equation\\12= \frac{4}{b}*b^2\\
12=4b|:4\\ 
b=3\\a= \frac{4}{3} \\
y=4^x
8 0
4 years ago
The length of an arc is 18cm and the radius of the circle is 6cm. What is the radian
ruslelena [56]

Answer:

3

Step-by-step explanation:

Radian= arc/radius

18/6=3

6 0
3 years ago
(100 pts.) Pre-Al Ratios and Proportionality, check img attactched
uysha [10]

Answer:

16

Step-by-step explanation:

Make a proportion:

66/12 = (104-r)/r

Simplify:

r = 16

8 0
3 years ago
Read 2 more answers
The dimensions for a rectangular prism are x + 2 for the length, x + 3 for the width, and x for the height. What is the volume o
Jlenok [28]
V = lwh

V = (x + 2)(x + 3)(x)

V = (x)(x^2 + 3x + 2x + 6)

V = (x^3 + 3x^2 + 2x^2 + 6x)

V = x^3 + 5x^2 + 6x

All you do is foil the dimensions together and then combine like terms. Hope this helps!
7 0
3 years ago
The constant of proportionality for this relationship is
Vera_Pavlovna [14]

Answer: The constant of proportionality is 1.5

Step-by-step explanation:

The equation for constant of proportionality is y=KX. the K stands for the constant of proportionality and since the constant proportionality is 1.5 you will take 1.5 * x and for example x is 2 so you do 1.5 * 2 and you get 3 and 3 is your y. If you plug in the equation you're saying 3 equals 1.5 * 2 which is right.

7 0
4 years ago
Read 2 more answers
Other questions:
  • Camryn practices the trumpet every 11th day and the flute every 3rd day. Camryn practiced both today. How many days until Camryn
    7·1 answer
  • Please solve this with working asap much appreciated!!
    10·1 answer
  • Jakob is asked to simplify the expression –3a + 4b + 5a + (–7b).
    10·1 answer
  • Administration know that 50% of the students at garden grove middle school ride the bus to school.
    7·1 answer
  • Amber's punch recipe called for 3 quarts of soda and 2 1/2 quarts of fruit juice how many quarts of soda will she need to make 1
    15·1 answer
  • PLEASE HELP ASAP I AM TIMED NO GUESSING THANK YOUUU'<br> 4)
    7·1 answer
  • Triangle ABC is congruent to triangle DEF. What side in triangle DEF is congruent to side AC?
    7·2 answers
  • 10+2345665434567876543234567876543234567+23456654323456787654323456765433456 Please i need help wink
    6·1 answer
  • The winner of a basketball contest is the individual who scores the highest percentage of free throws. The too three finishers a
    7·1 answer
  • Describe fully the single transformation which takes shape A to shape B.
    5·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!