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labwork [276]
3 years ago
5

A = − 5 ; b = 7 ; c = 1 − 2 a + 4 b − c 2=

Mathematics
1 answer:
lawyer [7]3 years ago
8 0
Answer:13

Step by step solution: see photo
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Subtract: 12 3/8 - 8 1/5 <br><br> A) 4 2/3 <br> B) 4 1/20 <br> C) 4 2/13 <br> D) 4 7/40
Alecsey [184]
Find the common denominator.
12 15/40 - 8 8/40 = 4 7/40 and the answer is D. Hope it helps! If you could vote my answer as the brainiest, that would be awesome! :)
5 0
3 years ago
Brand B snowblower has a 7 horsepower engine that is being advertised as a 40% larger engine than Brand A. How many horsepower d
stellarik [79]

Answer:

The answer is 4.2

Step-by-step explanation:

100%-40%=

60%

60%*7=

4.2

:)

6 0
3 years ago
The graph below shows the velocity f(t) of a runner during a certain time interval:
Jlenok [28]
For this case, the first thing we must do is take into account the definition of the axes:
 the x axis is time in seconds
 the y axis is velocity in meters per secon
 
 Then, we look for the cut point with the y axis, which is given by:
 (0, 2)
 This means that the initial speed is 2 m / s.
 
 We now look for the cut point with the x axis, which is given by:
 (8, 0)
 This means that the speed is 0 m / s, so the runner stopped when the time is 8 seconds.

 Answer:
 
The initial velocity of the runner was 2 m / s, and the runner stopped after 8 seconds.
5 0
3 years ago
Read 2 more answers
Help Evaluate each expression for d = -3.
Pavel [41]
Answer:
1) 9
2) 7
3) -10
4) -54
5) -64

Step-by-step explanation:
It’s just basic substitution
Hope this helps!
3 0
3 years ago
(MUST SHOW WORKING)
myrzilka [38]
First of all, keep in mind :
m --> cm = times by 100
cm --> mm = times by 10
mm --> cm = divide by 10
cm --> m = divide by 100

so we know that a square has 4 equal sides and to find the area of a square we do base*height. now these two numbers on the base and height are the same so we're basically squaring them to get the area of 81. therefore, we do the reverse so square root 81 and we get the answer 9cm

now let's convert 9cm to mm
= 9*10 = 90
area in mm = 90mm

now let's convert 9cm to meters
= 9/100=0.09
area in m = 0.09m

and finally, we already worked out the area in cm
= 9cm

hope this helped :)


3 0
3 years ago
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