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marishachu [46]
3 years ago
15

What is the slope of the line that passes through the points (9,5) and (21,1)

Mathematics
1 answer:
SOVA2 [1]3 years ago
4 0

Answer:

Step-by-step explanation:

You can get the slope of a line with the following equation y2 - y1 / x2 - x1

Thus the unsimplified answer is -4/12, but this needs to be simplified. By finding the least common denominator, you can make slopes easier to use. Using this method, the answer is -1/3

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Is 10 a solution of 2y+7(y-3)=60
slamgirl [31]
The answer to 2y+7(y-3)=60 is y=9
6 0
3 years ago
Which expressions are equivalent to {22c + 33d}22c+33d22, c, plus, 33, d?
kotegsom [21]
A
 (-2c-3d) (- 11) (- 2c-3d) (- 11) left parenthesis, minus, 2, c, minus, 3, d, right parenthesis, left parenthesis, minus, 11, right parenthesis
 C
 (66c + 99d) \ cdot \ dfrac {1} {3} (66c + 99d) ⋅ 3
1 left parenthesis, 66, c, plus, 99, d, right parenthesis, dot, start fraction, 1, divided by, 3, end fraction
<span> E
 11\cdot(2c+3d)11⋅(2c+3d)11, dot, left parenthesis, 2, c, plus, 3, d, right parenthesis
</span> answer
 (-2c-3d) (- 11) = 22c + 33d
 (66c + 99d) * 1/3 = 22c + 33d
 11 * ( 2c+3d) = 22c + 33d
4 0
4 years ago
Read 2 more answers
Doreen Schmidt is a chemist. She needs to prepare 28 ounces of a 8% hydrochloric acid solution. Find the amount of 14% solution
scZoUnD [109]

Let, amount of 14% solution required is x ounces.

So, amount of 8% solution will be ( 28 - x ) ounces.

Now, mathematical equation is :

\dfrac{14x}{100}+\dfrac{7(28-x)}{100}= \dfrac{8\times 28}{100}\\\\14x + 196  - 7x = 224\\\\7x = 28\\\\x = 4\ ounces

Therefore, amount of 14% solution and 8% solution required is 4 ounces and 24 ounces respectively.

Hence, this is the required solution.

5 0
3 years ago
Given: -1/2x &gt; 6.
lubasha [3.4K]

Answer:

B(2)

Step-by-step explanation:

SO basically think of it as x is a teenager that wants to be alone. so  have to figure out how to get everyone on the otehr side of their bedroom door (>)

so you are going to do this

-1/2x>6

/-1/2x  /-1/2x

x<6/-1/2

x<6*-2/1

x<-12

Read more on Brainly.com - brainly.com/question/14190937#readmore

8 0
3 years ago
The model for radioactive decay Is y = yoek. A radioactive substance has a half-life of 1110 years. If 50 grams are present toda
8_murik_8 [283]

Given the equation:

y=y_0e^{-kt}

You know that the radioactive substance has this half-life (in years)

t=1110

And:

y=\frac{y_0}{2}

Therefore, you can rewrite the equation in this form in order to find "k":

\frac{1}{2}=e^{-k(1110)}

Solve for "k":

undefined

5 0
1 year ago
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