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EastWind [94]
3 years ago
12

I neeeeed help thankyou

Mathematics
1 answer:
Helen [10]3 years ago
7 0

Answer:

what one

Step-by-step explanation:

if it is the left one it is -7(2x)+-7(7)+10x=-4x

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You can jog around the block twice and the park once in 10 min. You can jog around the block twice and the park 3 times in 22 mi
stich3 [128]
B = block     p = park

2b + p = 10 min                2 runs around the block takes 10 minutes
2b + 3p = 22 min        2 runs around the block plus 3 runs around the park                                                       takes 22 minutes

To solve, I will use substitution. First, I will divide the first equation by 2 to get b by itself and subtract p from both sides to get b by itself. Then, substitute 5 - 1/2p in for b in the second equation because they have equal values. Then, subtract 10 from both sides to eliminate it. Divide by 2 to both sides to get 'p' by itself.

2b + p = 10 min ---------→b + 1/2p = 5 ----------→ b = 5 - 1/2p

2(5 - 1/2p) + 3p = 22 ---------→ 10 -p + 3p = 22 --------→ 10 + 2p = 22

10 + 3p = 22 ----------→ 2p = 12

2p = 12 -------------→ p = 6

It takes 6 minutes to jog around the park

Hope this helps!
6 0
3 years ago
Write an expression that is equivalent to 2/3(4x + 9). (4 points) Select one: a. 8/3x + 6 b. 8/3x + 9 c. 2/3x + 6 d. 2/3x + 9
Lady_Fox [76]
You have to distribute the 2/3 across the equation.

8/3x+18/3 which is 8/3x+6 so the answer is a

I hope that helps
3 0
3 years ago
5/7+(-1/3)-(-1/2)<br><br> Show work pls
ELEN [110]
30/42-14/42+21/42= 37/42
7 0
3 years ago
6, g 30,5 what is g ?
Troyanec [42]

Answer:

Do you mean g as in the acceleration due to gravity on Earth?

if so, it is 30.5g= 30.5 x 9.81 = 299.205 m/s^2

Step-by-step explanation:

5 0
2 years ago
Simplify this expression.<br><br> (1-3k) + (2 + 2.5k)
Crank

(1 - 3k) + (2 + 2.5k)

= 1 - 3k + 2 + 2.5k

= (1 + 2) + ( - 3k + 2.5k)

= 3  + ( - 0.5k)

= 3 - 0.5k

7 0
3 years ago
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