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alekssr [168]
4 years ago
5

7TH GRADE MATH! PLEASE HELP BRAINLIEST ANSWER!

Mathematics
2 answers:
notsponge [240]4 years ago
4 0
Y = kx is the direct variation equation
Fill in the x and y given to solve for k. Then write a new equation with k to solve for future equations.
7 = 2 * k
7/2 = k

y = 7/2 x

21 = (7/2) x
(2/7)(21) = x
6 = x
Harlamova29_29 [7]4 years ago
3 0
<span>If y varies directly with x, the formula of the equation is y=ax, where a is a constant.
y=ax
(21)=a(7)
a=3
y=ax
y=(3)(-1.66)
y=-4.98, x=-1.66

If y varies inversely with x, the formula of the equation is y=a/x, where a is a constant
y=a/x
9=a/2.5
a=22.5
y=22.5/x
y=22.5/-0.6
y=-37.5

I hope this helped! =)
I hope you didn't mind but I got this from a website called: answers.yahoo.com but I got your answer.
</span>
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A una persona le ofrecieron dos trabajos de vendedor. En la empresa A, le ofrecieron al mes un sueldo base de $6 000 más una com
Dominik [7]

Concluimos que a partir de 21 piezas se gana más en la empresa B.

<h3>¿Cuanto debe vender para que le paguen más en la empresa B?</h3>

Si definimos el número de piezas vendidas como x, la cantidad que le pagan en la empresa A es:

A(x) = $6000 + $20*x

Y lo que le pagan en la empresa B es:

B(x) = $6000 + x^2

Queremos ver para que valor de x, se da que B(x) > A(x).

Entoces resolvamos esa inequación.

6000 + 20*x < 6000 + x^2

20x < x^2

20 < x

x debe ser más grande que 20, entonces concluimos que a partir de 21 piezas se gana más en la empresa B.

Sí quieres aprender más sobre inecuaciones, puedes leer:

brainly.com/question/23023694

4 0
2 years ago
billy has 2.4m of ribbon for crafts. he wants to share it evenly with 12 friends. how many centimeters of ribbon would 7 friends
Anna11 [10]
The 7 friends would get 1.4m of ribbon.

You would have to do 2.4 divided by 12 to get 0.2. Then multiply 0.2 by 7 to get 1.4.
3 0
2 years ago
Read 2 more answers
What is the volume of the rectangular prism?
Korvikt [17]

Answer:

7 yd^3

hope this helps

have a good day :)

Step-by-step explanation:

7 0
3 years ago
Read 2 more answers
Solve. .<br> -7 (-5) + 8<br> 3<br> 4<br> 60<br> -21
scZoUnD [109]

Answer:

Hey! The answer is <em>-4 5/12</em>

Step-by-step explanation:

<em>First, make all the  mixed number into a improper fraction.</em>

<em>Next, find the least common multiple.</em>

<em>Than, adjust the fractions basied on the LCM.</em>

<em>Lastly, convert the improper fractions to mixed numbers</em>

<em>follow these steps in order to get -4 5/12 as your answer.</em>

<em>so therefore your answer will be:</em>

<em>-4 5/12</em>

hope this helps!

4 0
3 years ago
Find the missing angle *
madreJ [45]

Answer:

53°

Step-by-step explanation:

b+37°=90°(being sum of angles of right angle)

or,b=90°-37°

or,b=53°

7 0
4 years ago
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