pls pls pls help i give brainest and i will give 20 points and i will give a thanks plssss sove 22 and 23

Mathematics

1 answer:

CaHeK987 [17]2 years ago

6 0

Answer:

8. C 9. B

Step-by-step explanation:

8. (-15)/3 = -5

-5 + 17 = 12

9. 14-3 = 11

2 x 11 = 22

You might be interested in

Please show all work with the answers please

kenny6666 [7]

Part A

The angle of elevation of the staire case is given by

$Angle\ of\ elevation=\tan^{-1}{ \frac{Vertical\ rise}{landing} } \\ \\ =\tan^{-1}{ \frac{14}{20} }\approx35^o$

Part B:

<span>If the landing of each step is changed to 17 inches and the elevation of each step to 21 inches, the new angle of elevation for the staircase is given by

</span><span> $Angle\ of\ elevation=\tan^{-1}{ \frac{Vertical\ rise}{landing} } \\ \\ =\tan^{-1}{ \frac{17}{21} }\approx39^o$ </span>

5 0

2 years ago

Solve: 3(2x+1)-2(x+5)-5(5-2x)=16 value of x?

makvit [3.9K]

Step-by-step explanation:

3(2x + 1) - 2(x + 5) - 5(5 - 2x) = 16

6x + 3 - 2x - 10 - 25 + 10x = 16

6x - 2x + 10x = 16 - 3 + 10 + 25

14x = 48

x = 48/14

x = 24/7

7 0