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a_sh-v [17]
3 years ago
13

Alloys C and D are composed of metals X and Y in the ratios 6:3 and 5:7 respectively by weight. How many kg of X must be melted

along with 30 kg of alloy C and 65 kg of alloy D so as to produce a new alloy containing 50% by weight of X?
Mathematics
1 answer:
Kaylis [27]3 years ago
5 0
Tbh i dont remember how to do ratios sorry

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belka [17]

Answer:

neither do I'm stuck on that one

8 0
3 years ago
This table gives points on a line. What is the equation of the line?
vitfil [10]

Answer:

y = -2x + 5

Step-by-step explanation:

Assuming this is linear, the slope would be constant. For every 1 x, y decreases by 2. This means that the slope is -2.

y = -2x + b

Now all we need is the y-intercept.

If we plug in the first point (1,3), we get:

3 = -2*1+b

3 = -2+b

b = 5

This is the y-intercept.

y = -2x + 5

6 0
3 years ago
<img src="https://tex.z-dn.net/?f=x%5E%7B2%7D%20-%2022x%20%2B121" id="TexFormula1" title="x^{2} - 22x +121" alt="x^{2} - 22x +12
cupoosta [38]

x2 - 22x + 121

= x2 - 11x - 11x +121

= x(x-11) - 11 ( x -11)

= (x-11) (x-11)

6 0
3 years ago
2/3(3/5x+9)=(2x+40)<br><br> Algebra II
Gennadij [26K]

Answer:

value if x is -21.25.

...............

8 0
3 years ago
A(x, 1), B(5,3) and C(4,-3) are the vertices of triangle ABC. If AB=AC, find the value of x​
Molodets [167]

\\ \rm\longmapsto AB=AC

\\ \rm\longmapsto \sqrt{(x-5)^2+(1-5)^2}=\sqrt{(x-4)^2+(1+3)^2}

\\ \rm\longmapsto (x-5)^2+(-2)^2=(x-4)^2+4^2

\\ \rm\longmapsto (x-5)^2+4=(x-4)^2+16

\\ \rm\longmapsto (x-5)^2-(x-4)^2=16-4=12

\\ \rm\longmapsto x^2-10x+25-x^2+8x-16=12

\\ \rm\longmapsto -2x+9=12

\\ \rm\longmapsto -2x=12-9=3

\\ \rm\longmapsto x=\dfrac{3}{-2}=-1.5

5 0
3 years ago
Read 2 more answers
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