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GREYUIT [131]
4 years ago
8

The following below shows values for x and y. If y varies directly with x, what is the constant of variation?

Mathematics
2 answers:
Bingel [31]4 years ago
4 0
Option C is correct.
blagie [28]4 years ago
4 0
X up ---- 2
y is up down ---- -6

now you divide. -6/2. = -3

you answer is C

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Can you explain step by step for #15 and #16 I have a test on this tomorrow
RUDIKE [14]

Answer:

15.

\left\{\begin{array}{l}x+y=50\\0.2x+0.1y=6\end{array}\right.

16. 10 ml of 20% saline and 40 ml of 10% saline

Step-by-step explanation:

A chemist takes x ml of 20% saline and y ml of 10% saline. In total, he takes

x + y ml that is 50 ml, so

x + y = 50.

There are  0.2x ml of salt in x ml of 20% saline and 0.1y ml of salt in 10% saline. There are 0.12\cdot 50=6 ml of salt in 50 ml of 12% saline. Thus,

0.2x+0.1y=6

15. We get the system of two equations:

\left\{\begin{array}{l}x+y=50\\0.2x+0.1y=6\end{array}\right.

16. Solve this system. From the first equation:

x=50-y

Substitute it into the second equation:

0.2(50-y)+0.1y=6\\ \\10-0.2y+0.1y=6\\ \\-0.1y=6-10\\ \\-0.1y=-4\\ \\y=40\\ \\x=50-y=50-40=10

7 0
3 years ago
The leg of a right triangle is 3 units and the hypotenuse is 11 units. What is the length, in units, of the other leg of the tri
son4ous [18]

Answer:

D

Step-by-step explanation:

8 0
3 years ago
Which of the followinkg is a rational number that is not an integer?<br> -2<br> -0.5<br> 0<br> 4
g100num [7]
It’s -0.5 because it an integer has to be whole number hope this helps :)
6 0
3 years ago
Is 3/6 greater than 0/6
tekilochka [14]
Yes 3/6 is greater than 0/6.
0/6 is equal to 0
7 0
4 years ago
Can some one help me answer all ten questions they are due at 10:00 I will give out brainly. Part 3 Bonus question
mixer [17]

Answer:

226

Step-by-step explanation:

Area of rectangle:

x+6=17

x=11

11+6=17

11+3=14

17×14=238

Area of triangle:

\frac{1}{2}  \times b \times h

Use phytagoras theorem to find the base of the triangle:

c²=a²+b²

5²=4²+b²

25=16+b²

b²=25-16

b²=9

b=√9

b=3 (only the half)

b=6 (the whole base)

\frac{1}{2}  \times 6 \times 4

3×4

12

Shades region:

238-12

=226

5 0
3 years ago
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