Question

Find how many kilometers were traveled by bike.

Answer 1

"biked 70 km more than bused" means that biked = bused + 70
x = y + 70

Answer 2

so solve

x = y + 70
x + y = 300

Answer 3

so would i do 300=70y?

Answer 4

how did you get 70y, it's 70 + y

Answer 5

idek

Answer 6

since the first equation is solve for "x" you can replace "x" with "y + 70" whenever x shows up

Answer 7

x + y = 300

becomes

y + 70 + y = 300

solve for y

Answer 8

y=115?

Answer 9

good

so if y = 115 and x + y = 300, how much is x?

Answer 10

185?

Answer 11

good so 185 is your answer

Answer 12

thx and DANG ur good at math lol

Answer 13

how many dimes did jenny have

Answer 14

0.10d + 0.25q = 7.75
d + q = 40 solve

Answer 15

I would use elimination

Answer 16

idk how to do that yet

Answer 17

since we want to eliminate q, we can multiply the second equation by 0.25 to match the first

Answer 18

0.10d + 0.25q = 7.75
0.25d +0.25q = 10

Answer 19

ok

Answer 20

after we subtract we get 0.15d = 2.25

Answer 21

and get d=15?

Answer 22

yeah that's your ans

Answer 23

How many cans of corn does he buy?

Answer 24

same thing as before

Answer 25

0.80t + 0.40c = 20.80
t + c = 36

Answer 26

solve for c

Answer 27

multiply the 2nd one by0.40?

Answer 28

actually, since we want to eliminate t, we must multiply by 0.80 to get 0.80t in the second row

Answer 29

oh ok

Answer 30

0.80t + 0.40c = 20.80
0.80t + 0.80c = 28.80

Answer 31

subtracting gives us 0.40c = 8

Answer 32

c = ?

Answer 33

20!

Answer 34

good

Answer 35

AYE

Answer 36

so 20 is the answer?

Answer 37

yes

Answer 38

find the width in meters

Answer 39

L = W + 4
2L + 2W = 24

solve for W (you can use substitution)

Answer 40

so how would i start this?

Answer 41

L = W + 4

means you can replace "L' with "W+4" when it shows up

Answer 42

2L + 2W = 24 becomes

2(W+4) + 2W = 24

solve for W

Answer 43

w=4

Answer 44

good

Answer 45

thats the answer?

Answer 46

yes

Answer 47

How many people ordered turkey

Answer 48

3.75t + 3.50b = 36.25
t + b = 10

solve for t

Answer 49

would we do the elimination for this one?

Answer 50

sure

since you want to eliminate b, multiply equation 2 by 3.50

Answer 51

ok

Answer 52

3.75t + 3.50b = 36.25
3.50t + 3.50b = 35

Answer 53

then subtract

Answer 54

0.25t = 1.25

Answer 55

so,,, 3.50t+3.50t+35=36.25?

Answer 56

i mean 3.50t+3.75t+10=36.25

Answer 57

?

Answer 58

subtract, not add

Answer 59

3.75t - 3.50t = 0.25 t
3.50t - 3.50b = 0

Answer 60

ok so... 3.50t-3.75t-10=36.25?

Answer 61

yeah 35... sorry my brain is fried from all this math XD

Answer 62

should end up being 0.25t = 1.25

Answer 63

making t = 5 = your answer

Answer 64

thx

Answer 65

correct!

Answer 66

since you have - 3y in both equations, subtract first equation - second equation (watch your positive/negative signs)

Answer 67

-10x - 6x = ?

Answer 68

-16x

Answer 69

?

Answer 70

good

-88 - 24 = ?

Answer 71

-112

Answer 72

good so -16x = -112

x = ?

Answer 73

7

Answer 74

good, so if x = 7 we can substitute back into equation 2

6(7) = 24 - 3y
y = ?

Answer 75

-6?

Answer 76

good so (7,-6) = your ans

Answer 77

sweet

Answer 78

same thing, just subtract the two equations and find x

Answer 79

the two -8?

Answer 80

the entire equations

Answer 81

start by subtracting the x's

Answer 82

i got -2.3repeated

Answer 83

20x - (- 8x) = ?

Answer 84

28x

Answer 85

good

28 - (-56) = ?

Answer 86

84

Answer 87

good

so if 28x = 84, x = ?

Answer 88

3!

Answer 89

good, so now we substitute back into eq. 2

Answer 90

-8(3) = -56 - 8y

y = ?

Answer 91

-4

Answer 92

so... 3,-4

Answer 93

good

Answer 94

same concept, subtract the equations.

Answer 95

23x=50-14y?

Answer 96

-16x - 7x = ?

Answer 97

-23 oops i was thinking 23-(-7)

Answer 98

wait

Answer 99

sorry it should have been -16x - (-7x) = ?

Answer 100

-9

Answer 101

?

Answer 102

good, -9x

Answer 103

50 - 77 = ?

Answer 104

-27

Answer 105

good, so -9x = -27, so x = ?

Answer 106

3

Answer 107

good

now we re-substitute

Answer 108

-7(3) = 77 - 14y

y = ?

Answer 109

7

Answer 110

good, so (3,7)

Answer 111

so... 3,7

Answer 112

?

Answer 113

yes

Answer 114

since you have +12y and - 12y you can add the equations together and solve for x

Answer 115

make sure you add everything together

Answer 116

ok ill try

Answer 117

so would it be x=-2.8+1.2y?

Answer 118

68 - 28 = ?

Answer 119

40

Answer 120

good

so 10x = 40, so x = ?

Answer 121

4

Answer 122

and y = 5?

Answer 123

sorry got distracted

Answer 124

your previous answer was right

Answer 125

for the new question, do the same thing, add the equations together (make sure you are adding the whole numbers together too)

Answer 126

you can use @vocaloid to ping me if I'm afk

Answer 127

x=-9?

Answer 128

add the x's together

Answer 129

16x - 8x = ?

Answer 130

omg i thought u had to subtract :0

Answer 131

its 8

Answer 132

8x, good

Answer 133

-44 + 28 = ?

Answer 134

oh wait i got that lol

Answer 135

8x=-72
divide by 8 on both sides
x=-9

Answer 136

it's not -72

Answer 137

-44 + 28 = ?

Answer 138

ugh im dying inside

Answer 139

do you need to take a break? we've been at this for a while

Answer 140

uh sure ill txt u in about 10-15 mins ok?

Answer 141

sure

Answer 142

thx

Answer 143

ok so we have:

-44 + 28 = ?

Answer 144

-72

Answer 145

nope

Answer 146

https://www.google.com/search?site=&source=hp&q=-44%2B28&oq=-44%2B28&gs_l=psy-ab.3...48.1278.0.1521.6.6.0.0.0.0.139.339.5j1.6.0....0...1.1.64.psy-ab..0.1.139...0.XlG4hft8bME

Answer 147

oh i thought it said -28

Answer 148

so if 8x = -16 then x = ?

Answer 149

-2

Answer 150

good

Answer 151

then we can substitute

8(-2) = 28 + 4y

y = ?

Answer 152

11

Answer 153

am i right?

Answer 154

should be -11

Answer 155

oh ok i see

Answer 156

so you end up with (-2,-11)

Answer 157

yup

Answer 158

can we start a new question, this post is getting long

Answer 159

yeah