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3 years ago

17. Tina runs at a rate of 8 miles per hour. At that rate,

Mathematics

2 answers:

ra1l [238]3 years ago

8 0

The answer is 1.6 miles

hram777 [196]3 years ago

6 0

Answer:

1.6 miles

Step-by-step explanation:

60/12=5

which will mean 1/5=.2

.2x8=1.6 miles

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A necklace and earrings cost $144. Six necklaces and five pairs of earrings cost $825

hram777 [196]

Step-by-step explanation:

let necklace : x

let earrings : y

x+y=144 -1st eqn

6x+5y=825 -2nd eqn

y=144-X -3rd eqn

substitute eqn into 2nd eqn

6x+5(144-x)= 825

6x +720-5X =825 (expanded)

X = 825-720

X =105

substitute "X=105" into 1st eqn

(105)+y=144

y= 144-105

y=39

1 necklace = 105$

1 pair of earrings = 39$

(to check back: substitute the value into the original eqn)

6 0

3 years ago

6z-4-z+10=-9 plz help and hurry

Anna35 [415]

6z -4 - z + 10 = -9
Combine like terms
5z + 6 = -9
Subtract both sides by 6
5z = -15
Divide both sides by 5
z = -3
Have an awesome day! :)

7 0

3 years ago

9x – 1= 10x + 9 What is x equal to

ivolga24 [154]

Answer:

-10=x

Step-by-step explanation:

9x-1=10x+9

9x-10×=9+1

-x=10

x=-10

4 0

3 years ago

-2(3x+9)=-54 AND 2(3x+4) -3x=35 SHOW WORK PLEASE

Naily [24]

Answer:

1. x=6

2. x=9

Step-by-step explanation:

$-2(3x+9)=-54\\-6x-18=-54\\+18 +18\\-6x=-36\\\frac{-6x}{-6} = \frac{-36}{-6}\\x=6$

$2(3x+4)-3x=35\\6x+8-3x=35\\3x+8=35\\-8 -8\\3x=27\\\frac{3x}{3} =\frac{27}{3} \\x=9$

Written Explanation:

-2x(3x+9)=-54

-6x-`8=54 (Distributive property)

Add 18 to both sides

-6x=-36

Divide both sides by -6 (negative divided by a negative equals a positive)

x=6

2(3x+4)-3x=35

6x+8-3x=35 (distributive property)

3x+8=35 (combine Iike terms and then subtract them 6x-3x=3x)

Subtract 8 from both sides

3x=27

Divide both sides by 3

x=9

5 0

3 years ago

Which expression is equivalent to 23-5

Anna11 [10]

Answer:

9+9

Step-by-step explanation:

9+9=18

23-5=18

4 0

3 years ago