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Lelechka [254]
3 years ago
12

3/4x+3y=12 for x when y=5

Mathematics
1 answer:
Karolina [17]3 years ago
4 0
Solve for x by simplifying both sides of the equation, then isolating the variable.
x = -4
Hope this helps! :)
Happy New Years!
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A dress shop bought material for £4.65 a metre and sold it for £6.90 a metre. How much
stepladder [879]

Answer:

  £67.50

Step-by-step explanation:

On each metre of material, the shop makes a profit of ...

  £6.90 -4.65 = £2.25

So, for 30 metres, the profit will total ...

  30 × £2.25 = £67.50

A profit of £67.50 would be made on a 30-metre roll of material.

8 0
3 years ago
Find the global maximum and global minimum values (if they exist) of x 2 + y 2 in the region x + y = 1. If there is no global ma
Grace [21]

Given that x+y=1, we have y=1-x, so that

f(x,y)=x^2+y^2\iff g(x)=x^2+(1-x)^2

Take the derivative and find the critical points of g:

g'(x)=2x-2(1-x)=4x-2=0\implies x=\dfrac12

Take the second derivative and evaluate it at the critical point:

g''(x)=4>0

Since g'' is positive for all x, the critical point is a minimum.

At the critical point, we get the minimum value g\left(\frac12\right)=f\left(\frac12,\frac12\right)=\frac12.

5 0
3 years ago
Which situation can be represented by this inequality?
Solnce55 [7]

Answer:

Stefan spends $6.50 on supplies for lemonade stand and sells each cup of lemonade for $1.25. What is x, the number of cups of lemonade Stefan must sell to earn a profit of more than $50

7 0
3 years ago
Consider the sequence of steps to solve the equation: 2(x − 4) + 6x = 9x − 10 Given ⇒ 2(x − 4) + 6x = 9x − 10 Step 1 ⇒ 2x − 8 +
hram777 [196]

Answer:

step 3 and step 4

Step-by-step explanation:

2(x − 4) + 6x = 9x − 10

2x - 8 + 6x  = 9x - 10

2x +6x - 9x  = -10 + 8

             -x    = -2

                 x = 2

4 0
3 years ago
Write this as a fraction
Vladimir [108]

Answer:

\frac{17}{99}

Step-by-step explanation:

4 0
3 years ago
Read 2 more answers
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