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IgorLugansk [536]
3 years ago
12

Evaluate this expression -2.8 + -2.5

Mathematics
2 answers:
k0ka [10]3 years ago
5 0

Answer:

-5.3

Step-by-step explanation:

-2.8+(-2.5)=-2.8-2.5=-5.3

Nitella [24]3 years ago
4 0

Answer:

-5.3

Step-by-step explanation:

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In a classroom of students 3 out of 5 students are boys. If the total amount of students is 35 how many students are boys. Pleas
Bumek [7]

Answer:

there is 21 boys

Step-by-step explanation:

hope that helps

6 0
2 years ago
Write the equation in point slope intercept form of the line that passes through (6,-11) and is parallel to the graph of y=-2/3x
Alina [70]

Answer:

y+11=-2/3(x-6)

Step-by-step explanation:

To find the parallel line, we would just plug in the numbers in the point-slope form from what we're given. We have y=-2/3x+12 and (6,-11).

Point-slope form:

y-y1=m(x-x1) → y+11=-2/3(x-6)

m represents the slope, which is -2/3 in this situation.

y1 represents the y coordinate, which is -11 in this situation. However, when we plug in negative numbers in a point-slope form, we would do the opposite of the negative number, which is to make it a positive in point-slope form.

x1 represents the x coordinate, which is 6 in this situation.

8 0
3 years ago
How to solve f(4) = x^2+7x-22
geniusboy [140]

Answer:

22

Step-by-step explanation:

1. Plugin 4 for each corresponding X value

2. Should look like 4^2+7(4)-22

3. Once ran through a calculator you should end up with a value of 22

6 0
2 years ago
What is not perpendicular to 7x +2y= 3
vfiekz [6]

Every line that does not have the slope of 2/7 is perpendicular to this line.

In order to find this fact, we first must find what is perpendicular. To do that, we first have to find the slope of this line. We can do this by solving for y.

7x + 2y = 3

2y = -7x + 3

y = -7/2x + 3/2

Now we can take the slope of -7/2 and flip and negate it. This will give us the perpendicular slope (2/7). Now we know any line that does not have this slope is not perpendicular to this line.

6 0
2 years ago
4 cot theta<br>=<br>tan theta<br>how do I I find the value of quadrant?​
Ray Of Light [21]

Answer:

4cotα=tanα

4(1/tanα)=tanα

(4/tanα)=tanα

cross multiply

=> 4=tan²α

√4=√tan²α

±2=tanα

α=arc( tan) |2|

α=63.4° ( in first quadrant)

and

α=180+63.4=243.4 in the third quadrant

since we also found a negative answer( i.e –2) then α also lies in quadrants where it gives a negative value(i.e second and fourth quadrants)

α=180–63.4=116.6° in the second quadrant

α=360–63.4=296.6 in the fourth quadrant

therefore theta( in my case, alpha) lies in all four quadrants and is equal to:

α=63.4°,243.4°,116.6°and 296.6°

5 0
3 years ago
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