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shtirl [24]
2 years ago
15

Enter the correct value so that each expression is a perfect-square trinomial. x2 – 10x +

Mathematics
1 answer:
Vlad [161]2 years ago
6 0

Answer:

x^2 - 10x + 25

Step-by-step explanation:

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Which equation represents a line which is perpendicular to the line 5y-4x=-15 5y−4x=−15?
Lady bird [3.3K]
Y = -5/4x + b is the equation that represents a line that is perpendicular to the line 5y-4x=-15

If you want it in standard form, it is 5x+4y=-15
4 0
3 years ago
during a research experiment, it was found that the number of bacteria in a culture grew at a rate proportional to its size. At
BaLLatris [955]

Answer:

10,600

Step-by-step explanation:

The bacteria grew in 2 hours by 800. Divide that and that it by 400 per hour.

Since it is a proportional rate, we can assume that the rate continue through till midnight.

Since midnight is 12 hours after noon then the bacteria grow 400 (12)=4800.

We add this to the population at noon 5800+4800=10,600.

5 0
3 years ago
25 is what percent of 20?
denis-greek [22]

Answer:

20 is 80% of 25

Step-by-step explanation:

We assume, that the number 25 is 100% - because it's the output value of the task.

2. We assume, that x is the value we are looking for.

3. If 100% equals 25, so we can write it down as 100%=25.

4. We know, that x% equals 20 of the output value, so we can write it down as x%=20.

5. Now we have two simple equations:

1) 100%=25

2) x%=20

where left sides of both of them have the same units, and both right sides have the same units, so we can do something like that:

100%/x%=25/20

6. Now we just have to solve the simple equation, and we will get the solution we are looking for.

7. Solution for 20 is what percent of 25

100%/x%=25/20

(100/x)*x=(25/20)*x       - we multiply both sides of the equation by x

100=1.25*x       - we divide both sides of the equation by (1.25) to get x

100/1.25=x

80=x

x=80

8 0
3 years ago
Read 2 more answers
my water sprinkler turns 5 degrees with every click. if it turns 60 degrees total, how many times has it clicked?
Ket [755]
12 times because you divide 60 by 5 and get 12.
4 0
3 years ago
If 21 is added to a number the result is 40 less than twice the number what is the number?
Karolina [17]
If 21 is added to (+ 21) a number (x) the result (=) is 40 less than (- 40) twice the number (2x)

x + 21 = 2x - 40   Add 40 to both sides
x + 61 = 2x           Subtract x from both sides
      61 = x             Switch the sides to make it easier to read
       x = 61


7 0
3 years ago
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