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Lisa [10]
3 years ago
15

Find the value of this expression if x = -9. x2 + 1 x+7

Mathematics
1 answer:
Mamont248 [21]3 years ago
6 0

Answer:

-41

Step-by-step explanation:

You would replace all x's with -9 and solve.

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the original price of a skateboard is 50% the sale price includes 20% discount what is the sale price
ss7ja [257]

Answer:

50 × 0.8 = $40 is the sale price

Step-by-step explanation:

7 0
3 years ago
Problem is in the attached image. Thanks in advance!
lutik1710 [3]

Answer: it will take 2.5 hours for both people to meet after person B leaves.

Step-by-step explanation:

The distance between the house of person A and his cousin's house is 234 miles.

At the point where they meet, they would have travelled 234 miles.

Person A travelled at an average speed of 44 miles per hour.

Let t represent the time spent by Person A in travelling from his house to the point where they meet.

Distance = speed × time

Distance covered by person A would be

44 × t = 44t

One and half hours later, person B leaves his house to visit person A, travelling at an average speed of 62 miles per hour. This means that total time spent by person B in travelling to the point where they meet is (t - 0.5) hours. Distance covered would be

62(t - 0.5) = 62t - 31

Since the total distance covered is 234 miles, then

44t + 62t - 31 = 234

106t = 234 + 31 = 265

t = 265/106 = 2.5 hours

3 0
3 years ago
Given the following functions f(x) and g(x), solve f[g(6)]. f(x) = 6x + 12 g(x) = x − 8
iogann1982 [59]

Answer:

Answer:

Option 2nd is correct.

=0.

Step-by-step explanation:

Given the function:

Solve:

First calculate:

f[g(x)]

Substitute the function g(x)

Replace x with x-8 in the function f(x) we get;

The distributive property says that:

Using distributive property:

⇒

Put x = 6 we get;

Therefore, the value of   is 0.

Step-by-step explanation:

6 0
3 years ago
Read 2 more answers
A line has a y-intercept of -10 and a slope of 7/4 Find the equation of the line.
Gwar [14]

Answer:

(7/4)x - 10

Step-by-step explanation:

y = mx + c

m = gradient

c = y-intercept

so you just substitute in the respective values

6 0
3 years ago
Subtract.<br><br> (x + 1) − (−2x − 5)
scZoUnD [109]
3x+6, you have to distribute the negative to get the parentheses away and simplify
5 0
3 years ago
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