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Lerok [7]
3 years ago
10

Erica used friendly numbers to find 43-19. She added 1 to 19 and subtracted 1 from 43. What is Erica's error?

Mathematics
2 answers:
Naily [24]3 years ago
8 0
I think that it is....
42-20=22
Olenka [21]3 years ago
7 0
She could have added 1 to 19 to give 20 then subtracted  this from 43 to give 23. Then she can add the 1 to 23 to get the correct answer which is 24.
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What is the equation of the line that is perpendicular to the given line and passes through the point (5,3)
Pani-rosa [81]

perpendicular lines have a slope that is a negative reciprocal


A) 4x-5y=5

subtract 4x

solve for y

-5y = -4x+5

divide by -5

y = 4/5 x+5   slope is 4/5  perpendicular slope is -5/4

y -y1 =m(x-x1)  point slope form of a line

y-3 = -5/4 (x-5)

B)  5x+4y = 37

subtract 5x

4y =-5x +37

divide by 4

y =-5/4 x +37/4  slope is -5/4 perpendicular slope is 4/5

y -y1 =m(x-x1)  point slope form of a line

y-3 = 4/5 (x-5)

C)4x+5y=5

subtract 4x

5y = -4x +5

divide by 5

y = -4/5 x +1

y =-4/5 x +1  slope is -4/5 perpendicular slope is 5/4

y -y1 =m(x-x1)  point slope form of a line

y-3 = 5/4 (x-5)

D)5x-4y=8

subtract 5x

-4y = -5x+8

divide by -4

y = 5/4 x-2

y =5/4 x +-2 slope is 5/4 perpendicular slope is -4/5

y -y1 =m(x-x1)  point slope form of a line

y-3 = -4/5 (x-5)



6 0
3 years ago
Luke is 5 years younger than 3 times in Sydney's age in the situation what does 3s represnt
Fudgin [204]
3s is 3 times sydneys age. so the equation would be 3s-5
8 0
3 years ago
Write 16 3/5 as a decimal
zhuklara [117]
16.6 is the answer. 16 is the whole number so u just divide 3 and 5 and get .6
3 0
3 years ago
Read 2 more answers
What is the reciprocal of -0.06
vekshin1

Answer:

-16.666

Step-by-step explanation:

You can find the reciprocal by turning the intended fraction upside down.

\frac{-0.06}{1} ⤭ \frac{1}{-0.06} = \frac{100}{-6} = \frac{50}{-3} = <em>-16.6666666667</em>

6 0
2 years ago
Read 2 more answers
A cube has a volume of 125 cubic feet. What is the length of each side of the cube
Helen [10]
Length= 5
width=5
height= 5
3 0
2 years ago
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