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DedPeter [7]
4 years ago
9

Solve for u.

Mathematics
1 answer:
hjlf4 years ago
6 0

Answer:

u = -\frac{1}{2}   ;  u = -\frac{3}{2}

Step-by-step explanation:

4u² + 3 = -8u

4u² + 3 + 8u = -8u + 8u       (add 8u both sides)

4u² + 8u + 3 = 0                    simplify

using quadratic equation:

      - 8 ± √ (8² - 4 * 4 *3)

u = ------------------------------

               2 * 4

u = -\frac{1}{2}   ;  u = -\frac{3}{2}

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The function () = 3 − 4 has a range of {-7, -1, 0, 5, 11, 20}.<br> What is the domain?
padilas [110]

Question: The function f(x) = 3x-4 has a range of \{-7, -1, 0, 5, 11, 20\}.

What is the domain?

Domain: \{-1, 1,\frac{4}{3}  , 3, 5, 8\}

Step-by-step explanation:

Domain is the input, and range is the output. In other words, the domain is the x value, and the range is the f(x) (the whole value, output). So we will solve each one step by step, all with the same solution. To reiterate, what is done for -7, for instance, will be done for every other range.

Start with -7. Remember, solve this accordingly.

Replace the f(x) with the range

f(x) = 3x - 4\\\\=-7 = 3x - 4

Solve

-7 + 4 = -3

<em>(When adding negative a to a positive, it results in a negative.)</em>

\frac{-3}{3} = -1

That's how you solve it.

4 0
3 years ago
You have soccer practice every 4th day and violin lessons every 10th day. You
DiKsa [7]

Answer:

You would meet on day 40

Step-by-step explanation:

Because when you are multiplying ten with numbers then first number changes but the 0 doesnt and then 4 meets 10 at 20 and 40 because you can multiply ten and 4 and you would get 40 so therefore you would meet on day 40.

8 0
4 years ago
Picture ! can i get help with explanation
tekilochka [14]

Answer:

x= 68 degrees

Step-by-step explanation:

every triangle is = to 180 degrees so to find x add 75+37=112

then take 180-112=68

3 0
3 years ago
Read 2 more answers
The sum of mary's age and her mother's age is 36. mary's mom is 5 times older than mary. how old is each person
grandymaker [24]

mary + mom = 36

mom = 5x mary


mary + 5mary = 36

 6 mary = 36

mary = 36/6 =6

 mary is 6 years old

 her mother is 5 x 6 = 30 years old

5 0
3 years ago
Write a rule for linear function in the graph (4,3) (3 ,-1)​
yaroslaw [1]

Answer:

D) y = 4x - 13

Step-by-step explanation:

Slope: the change in y over the change in x

In a equation in slope-intercept form is in <em>y = mx + d, where m is the slope</em>.

The slope can be found by its definition. As<em> y goes up by 4, x goes up by 1</em>, so the slope is <em>4/1 = 4</em>.

The only option with 4 as the slope is D.

4 0
4 years ago
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