NEED HELP ASAP The temperature of a substance is -29.9°F. The temperature decreases by 8.7° and then again by 17.8°. Emilia write two strategies to find the final temperature of the substance. Strategy 1: Evaluate the expression -30 - 8 - 17 - 0.1 - 1.5. Strategy 2: evaluate the expression -29 - 8 - 17 - 1 - 0.4. 2.Which TWO statements are TRUE? A. The final temperature of the substance is -56.4°. B. Evaluating -29.9 - 8.7 - 17.8 is the same as evaluating -30 - 8 - 17 - 0.1 - 1.5, so strategy 1 is correct. C. Evaluating -29.9 - 8.7 - 17.8 is the same as evaluating -29 - 8 - 17 - 1 - 0.4, so strategy 2 is correct. D. Strategy 1 would be correct if the -30 is replaced with a -29. E. Strategy 2 would be correct if the 1 is replaced with a 2.

answer: 10 meter

step-by-step explanation:

need details

what is the question? i am guessing you are looking for the area.

to find an area, you have to do length x width.

in this case, it would be 12 ft x 4 ft = 48 sq. ft

region b will make the inequalities y < 2x + 1 and y > -x - 2 true ⇒ answer a

step-by-step explanation:

* lets study the graph and the inequality to solve the question

- the inequality y > -x - 2

∵ the form of the inequality is y > mx + c , m is the slope of the line

  and c is the y-intercept (the line intersect y-axis at point (0 , c)

∴ c = -2 that means the line intersect the y-axis at point (0 , -2)

∵ the sign of the inequality is >

∴ we shad the part over the line

  region a and b

- the inequality y < 2x + 1

∵ the form of the inequality is y > mx + c , m is the slope of the line

  and c is the y-intercept (the line intersect y-axis at point (0 , c)

∴ c = 1 that means the line intersect the y-axis at point (0 , 1)

∵ the sign of the inequality is <

∴ we shad the part under the line

  region b and c

∵ the common region between the two lines is region b

∴ region b will make the inequalities y < 2x + 1 and y > -x - 2 true

look at the picture.

1.

ef : ab = 2 : 3

gf : cb = 2 : 3

gh : cd = 2 : 3

he : da = 2 : 3

2.

∠a ≅ ∠e

∠b ≅ ∠f

∠c ≅ ∠g

∠d ≅ ∠h

3.

use pythagorean theorem:

the length of the abcd trapezoid sides:

|ab| = 3 cm

|bc| = 10 cm

|cd| = 3(3) cm = 9 cm

|da| = 8 cm

the perimeter of abcd = 3 + 10 + 9 + 8 = 30 cm

the ratio of perimeters of the tarapezoids is equal 2 : 3.

substitute:

      cross multiply

      divide both sides by 3