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arlik [135]
3 years ago
5

If f(x) = -x^2+3x, find (-5)

Mathematics
1 answer:
love history [14]3 years ago
4 0
The A/= it means the answer is okay.

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Students who attend Washington Middle School are either in seventh or eighth grade. At the end of the first semester 25% of the
Irina18 [472]

Answer:

There are <u>1240</u> students who attended Washington Middle School.

Step-by-step explanation:

Given:

Students who attend Washington Middle School are either in seventh or eighth grade.

At the end of the first semester 25% of the students at Washington Middle School were on the honor roll.

Seventh graders represented 60% of the students on the honor roll.

If 124 students on the honor roll were in eighth grade.

Now, to find the students attend Washington Middle School.

Let the total number of students be x.

So, the students at Washington Middle School were on the honor roll:

<u><em>25% of </em></u>x<u><em /></u>

=\frac{25}{100} \times x

=\frac{25x}{100}

=\frac{x}{4}

As, given seventh graders represented 60% of the students.

So, the students on the honor roll represented as seventh graders:

60\%\ of\ \frac{x}{4}

=\frac{60}{100} \times \frac{x}{4}

=0.6\times \frac{x}{4}

=\frac{0.6x}{4}

As, 124 students on the honor roll were in eighth graders.

Thus,

According to question:

\frac{x}{4} -\frac{0.6x}{4} =124

\frac{x-0.6x}{4} =124

\frac{0.4x}{4} =124

<em>Multiplying both sides by 4 we get:</em>

0.4x=496

<em>Dividing both sides by 0.4 we get:</em>

x=1240.

Therefore, there are 1240 students who attended Washington Middle School.

6 0
4 years ago
What are the solution(s) to the quadratic equation x2 – 25 = 0?
Anna71 [15]
Difference of 2 perfect squares
a^2-b^2=(a-b)(a+b)
25=5^2
x^2-5^2=(x-5)(x+5)=0
set to zero
x-5=0
x=5
x+5=0
x=-5

x=5 or -5

A
6 0
3 years ago
Helpppppo its an energy
Dahasolnce [82]

Answer:

for the first graph for the side of y it's five

Step-by-step explanation:

because no matter what numbers it is the difference is 5

3 0
3 years ago
What is the value of n? <br>in the graph below​
8_murik_8 [283]

Answer:

36

Step-by-step explanation:

180-144=36

7 0
3 years ago
Assume that lines that appear to be tangent are tangent o is the center of the circle
Greeley [361]
Attached is answer .............

8 0
4 years ago
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