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NemiM [27]
3 years ago
12

PLEASE HELP ASAP ): 25 PTS + BRAINLIEST TO RIGHT/BEST ANSWER

Mathematics
1 answer:
eimsori [14]3 years ago
3 0

Answer:

  c.  25

Step-by-step explanation:

(f ∘ g)(-2) = f(g(-2)) = f(-2-3) = (-5)² = 25

For this problem, it seems to work best to evaluate g(-2), then evaluate function f on that. (In other cases, it might be useful to simplify the composite function first.)

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Help please,thank you (question 20)
bixtya [17]

There are four properties involving multiplication that will help make problems easier to solve. They are the commutative, associative, multiplicative identity and distributive properties. Multiplicative Identity Property: The product of any number and one is that number. For example 5 * 1 = 5.

3 0
3 years ago
Please help? <br><br> (No link &lt;3)
Serggg [28]

Answer:

200

Step-by-step explanation:

6 0
3 years ago
in kurt's school, the ratio of boys to girls is 4/3. of 120 students are boys, how many students are girls?
sukhopar [10]

Answer:

90 of the students are girls.

Step-by-step explanation:

Boys : Girls

B : G

4 : 3

120 : ?

(120 ÷ 4 = 30) so 4 × 30 = 120

(Do this to the other side) 3 × 30 = 90

B : G

120 : 90 [90 girls out of 210 total students]

Hope this helps. :)

7 0
3 years ago
Find the equation of the line with slope −5 and that contains the point (−9,−5). Write the equation in the form y=mx+b and ident
Elina [12.6K]

Answer & Step-by-step explanation:

Slope-intercept form:

y=mx+b

m is the slope and b is the y-intercept. Insert the given slope:

y=-5x+b

To find the y-intercept, take the given coordinate point and insert:

(-9_{x},-5_{y})\\\\-5=-5(-9)+b

Solve for b:

Simplify multiplication:

-5=45+b

Subtract 45 from both sides:

-50=b\\\\b=-50

The y-intercept is -50. Insert:

y=-5x-50

m=-5\\b=-50

Use the slope formula for when you have two points:

\frac{y_{2}-y_{1}}{x_{2}-x_{1}}=\frac{rise}{run}

The slope is the change in the y-axis over the change in the x-axis, or rise over run. Insert the points:

(2_{x1},4_{y1})\\(10_{x2},2_{y2})

\frac{2-4}{10-2}=\frac{-2}{8}=-\frac{2}{8}=-\frac{1}{4}

The slope is -\frac{1}{4} . Insert:

y=-\frac{1}{4}x+b

Now follow the steps from the last problem to find the y-intercept. Choose a point and insert into the equation:

(2_{x},4_{y})\\\\4=-\frac{1}{4}(2)+b

Solve for b:

Simplify multiplication:

-\frac{1}{4}*\frac{2}{1}=-\frac{2}{4}=-\frac{1}{2}

Re-insert:

4=-\frac{1}{2} +b

Subtract b from both sides:

4-b=-\frac{1}{2} +b-b\\\\4-b=-\frac{1}{2}

Subtract 4 from both sides:

4-4-b=-\frac{1}{2}-4\\\\-b=-\frac{1}{2}-4

Simplify subtraction:

-\frac{1}{2}-4=-\frac{1}{2}  -\frac{4}{1} =-\frac{1}{2} -\frac{8}{2} \\\\-\frac{1}{2} -\frac{8}{2}=-\frac{9}{2}

Re-insert:

-b=-\frac{9}{2}

Divide both sides by -1 to make the variable positive (can be seen as -1b):

b=\frac{9}{2}

The y-intercept is \frac{9}{2} .

Write the equation:

y=-\frac{1}{4}x+\frac{9}{2}

:Done

7 0
3 years ago
Abby invested 4,500 in a saving account where she earned 2.5%interest compounded quarterly. She miscaulated what the accumulated
barxatty [35]

The final balance is $5,097.18

The total compound interest is $597.18

Step-by-step explanation:

6 0
3 years ago
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