All categories

4 years ago

URGENT NEED ANSWERS •_•

Mathematics

1 answer:

Anna11 [10]4 years ago

4 0

9. 130 = x + 137
answer x = -7

10. 9x-3 = 4 + 8x
9x = 7 + 8x
answer x = 7

You might be interested in

A/-8+15greater than 23

Ilia_Sergeevich [38]

Answer: $a$

Step-by-step explanation:

$\frac{a}{-8}+15>23$

Subtract 15 from both sides.

$\frac{a}{-8}+15-15>23-15\\\frac{a}{-8} >8$

Multiply by -8 to isolate a.

NOTE: When you multiply or divide by negative numbers, the inequality sign flips.

$-8*\frac{a}{-8}>8*-8$

$a$

8 0

4 years ago

The function f(x) = 28(1.45)x models the number of cats and dogs adopted from a local animal shelter, where x represents the num

Phantasy [73]

Answer:

Step-by-step explanation:

If that number is greater than 1, that means that the exponential equation represents growth. If that number is less than 1 but greater than 0, that means that the exponential equation represents decay. Since ours is greater than 1, our equation is exponential growth. It means that the perent of animals adopted grows at a rate of 145% per year, with a starting number of 28 animals in the first year.

6 0

4 years ago

Use cubic regression to find a function that fits the following points.

8090 [49]

Answer:

y = 2x³ + x² - 4x + 6

Step-by-step explanation:

General formula:

y = ax³ + bx² + cx + d

If you replace point (0, 6) in the general formula, you get:

6 = a(0)³ + b(0)² + c(0) + d

6 = d

If you replace points (-1, 9), (1, 5) and (2, 18) in the general formula, you get the following system of equations:

9 = a(-1)³ + b(-1)² + c(-1) + 6

9 = -a + b - c + 6 (eq. 1)

5 = a(1)³ + b(1)² + c(1) + 6

5 = a + b + c + 6 (eq. 2)

18 = a(2)³ + b(2)² + c(2) + d

18 = 8a + 4b + 2c + 6 (eq. 3)

Adding equation 1 to equation 2:

14 = 2b + 12

(14 - 12)/2 = b

b = 1

Multiplying equation 1 by 2:

18 = -2a + 2b - 2c + 12 (eq. 4)

Adding equation 4 to equation 3, and replacing with b value:

36 = 6a + 6b + 18

36 = 6a + 6 + 18

(36 - 6 - 18)/6 = a

a = 2

Replacing a and b values in equation 1:

9 = -2 + 1 - c + 6

c = -2 + 1 + 6 - 9

c = -4

8 0

3 years ago

Read 2 more answers

SOLVE FOR R-- r/6=5 2/3 A.34 B.30 2/3 C.20 D.17/18

taurus [48]

The answer is A. 34

r=34

r/6 = 5 2/3

5x3+2 over 3 = 17/3

r= 17/3 x 6 = 102/3

102 ÷ 3 = 34

3 0

3 years ago

Select the correct answer. This table represents a quadratic function. x y 0 -3 1 -3.75 2 -4 3 -3.75 4 -3 5 -1.75

lana [24]

Answer:

1/4

Step-by-step explanation:

that is the answer

I found the constant which was -3

a = 1/4

b=-1

7 0

3 years ago