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Igoryamba
3 years ago
11

In a certain​ chemical, the ratio of zinc to copper is 4 to 15. A jar of the chemical contains 375 grams of copper. How many gra

ms of zinc does it​ contain?
Mathematics
2 answers:
OverLord2011 [107]3 years ago
6 0

Answer:

<u>100 Grams of Zinc</u>

Step-by-step explanation:

15 <u>divided</u> by 4 is 3.75.

375 <u>divided</u> by 3.75 is 100.

<u>100 grams Zinc.</u>

Reika [66]3 years ago
4 0

Answer: 93 grams Zinc

Step-by-step explanation:

3 Zinc : 13 Copper

x 31       x 31            

93 Zinc,     403 Copper

or

set up a proportion, cross multiply, and solve for the variable:

3(403) = 13(x)

3(31) = x

93 = x

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A point located at (-5, -6) is reflected over the y-axis. What are the coordinates of the image? (-5, 6) (5, -6) (5, 6) (-6, -5)
BigorU [14]

<u>Answer:</u>

The correct answer option is (5, -6).

<u>Step-by-step explanation:</u>

We know that the following are the coordinates of a point:

( - 5 , - 6 )

If this point is reflected through y axis, we are to find the coordinates of its image?

If a point is reflected through y-axis, the sign of the x coordinate is changed so we get:

( - 5 , -6 ) \implies (5, -6)

7 0
3 years ago
What is the median of this data set?
USPshnik [31]

Answer:

it's 39 i think. .... ....... ......

4 0
3 years ago
Read 2 more answers
A line passes through the points (-8, 1) and (-1, 6). A second line passes through the points (-3,0) and (-8,-5). What is the po
finlep [7]
\begin{gathered} y=mx+b \\ m=\frac{6-1}{-1+8}=\frac{5}{7} \\ 6=\frac{5}{7}(-1)+b \\ 6+\frac{5}{7}=b \\ b=\frac{42+5}{7}=\frac{47}{7} \\ y=\frac{5}{7}x+\frac{47}{7} \end{gathered}

For the second line

\begin{gathered} y=mx+b \\ m=\frac{-5-0}{-8+3}=\frac{-5}{-5}=1 \\ 0=1(-3)+b \\ b=3 \\ y=x+3 \end{gathered}

The intersection will be

\begin{gathered} y=\frac{5}{7}x+\frac{47}{7} \\ x+3=\frac{5}{7}x+\frac{47}{7} \\ x-\frac{5}{7}x=\frac{47}{7}-3 \\ \frac{7x-5x}{7}=\frac{47-21}{7} \\ \frac{2x}{7}=\frac{26}{7} \\ 14x=182 \\ x=\frac{182}{14} \\ x=13 \\  \\ y=13+3=16 \end{gathered}

Therefore, the point of intersection is (13, 16)

6 0
1 year ago
The table shows the amounts y (in tons) of waste left in a landfill after x months of waste relocation. Use the table to complet
Irina-Kira [14]

Answer: it would take 1 year

Step-by-step explanation: scince it took 1/2 a year to get rid of half the waste it would take another 1/2 a year to get rid of the rest to it would take 1 year to get rid of all of the waste

4 0
3 years ago
Write the factored form of the polynomial.<br><br> P(x) = x4 – 7x3 + 13x2 + 3x – 18
Finger [1]

Answer:

(x+1)(x-2)(x-3)^2

Step-by-step explanation:

Sorry, mate. That math is too hard to type out online. You's guys will just have to take my word for it!

5 0
3 years ago
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