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zvonat [6]
4 years ago
11

If f(x) = -7x+5x^2+10, what does f(-2) equal?

Mathematics
2 answers:
Natalka [10]4 years ago
7 0

f(x) = -7x + 5x² + 10

f(-2) This means that x is -2, so you plug in -2 for "x" in the equation


f(x) = -7x + 5x² + 10

f(-2) = -7(-2) + 5(-2)² + 10

f(-2) = 14 + 5(4) + 10

f(-2) = 20 + 24

f(-2) = 44

Vikki [24]4 years ago
6 0

-7x+5x^2+10 f(-2)        given

-7(-2)+5(-2)^2+10         plug in -2 where you see X

14+5(4)+10                   do (-2)^2                

14+20+10                    multiply 5(4)

45                               add your numbers (this is the final)

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An ice cream shop sells 6 different flavors, 4 toppings, and 3 types of cones. How many different combinations of two different
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Answer:

360 combinations

Step-by-step explanation:

To calculate the number of different combinations of 2 different flavors, 1 topping, and 1 cone, we are going to use the rule of multiplication as:

<u>               6          </u>* <u>        5             </u> * <u>            4           </u>* <u>          3             </u>= 360

       1st flavor           2nd flavor              topping              cone

Because first, we have 6 possible options for the flavor, then we only have 5 possible options for the 2nd flavor. Then, we have 4 options for the topping and finally, we have 3 options for the cone.

It means that there are 360 different combinations of two different flavors, one topping, and one cone are possible

6 0
3 years ago
The difference of x and 5 is less than 21.<br> Translate the sentence into an inequality.
Ad libitum [116K]

Answer:

x-5<21

Step-by-step explanation:

3 0
3 years ago
The ratio of nonfiction books to fiction books in a library is 105 to 189. Which statement describes this relationship?
kolezko [41]

Answer: A)There are 5 nonfiction books for every 9 fiction books in the library.  

Step-by-step explanation: If you do the math you realize that there are clearly less nonfiction books than fiction books.

105/5=21 and after 21*9 lines up and to check your work than

5*21=105 and 9*21=189 it is not B because the smaller number 105 is in front of the ratio 105:189 and 5:9

7 0
4 years ago
Read 2 more answers
According to the school survey, 12% of the students at Rockwood Junior High School speak Spanish. There are 36 students at the s
elixir [45]
Mean=np
36=(0.12)n
n=300
300 students were surveyed.
That's the way I answer in my country but I'm not sure about this solution is correct in your school or not.
7 0
4 years ago
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Vance wants to determine if an old photo frame is still rectangular. The height of the frame is
sveticcg [70]

Answer:

<em>The old photo frame is still rectangular</em>

Step-by-step explanation:

<u>Rectangles</u>

The rectangle shape can be identified because it has 4 internal angles of 90° each. The diagonal forms with two adjacent sides a right triangle where the Pythagora's Theorem must stand. Being a and b the length of the sides of the rectangle and d the diagonal, then:

d^2=a^2+b^2

Vince's photo frame has dimensions of 8 inches and 6 inches, with a diagonal of 10 inches. If the above condition is met, then the frame is still rectangular.

Calculating:

10^2=6^2+8^2

100=36+64

100=100

Since the condition is met, the old photo frame is still rectangular

4 0
3 years ago
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