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pashok25 [27]
3 years ago
9

If 7(x+5) = -28 find the value of 6x

Mathematics
2 answers:
elixir [45]3 years ago
8 0
Answer:

-54

Explanation:

First we need to use the distributive property on 7(x+5), so do 7×x + 7×5. Simplify that and you get 7x+35.

Subtract 35 from both sides and you get 7x= -63. Divide both sides by 7 and you get x= -9.

Now we can substitute -9 for x, so do 6×-9 and you get -54.

Hope this helps :)
agasfer [191]3 years ago
6 0

7(x+5)=-28\\7x+(7*5)=-28\\7x+35=-28\\7x+35-35=-28-35\\7x=-63\\\frac{7x}{7}=\frac{-63}{7}\\x=-9\\\\6x=-54

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In 1928, when the high jump was first introduced as a women's sport at the Olympic Games, the winning jump for women was 70.0 in
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Answer: year 2194



Explanation:



1) Model the jump of the women:


i) initial jump = 70.0 in


ii) increase rate = 0.48% per year


iii) equation: h = 70.0(1 +0.0048)ⁿ


2) Model the jump of the men:


i) initial jump 86.5 inches.


ii) increase rate, 0.4%.


iii) equation: h = 86.5 (1 + 0.004)ⁿ


3) Equal the two equations (h = h) to find when the jumps will be equal:


i) 70.0(1 +0.0048)ⁿ = 86.5 (1 + 0.004)ⁿ


ii) 70.0(1.0048)ⁿ = 86.5 (1.004)ⁿ


ii) [1.0048ⁿ / 1.004ⁿ] = 86.5/70.0


iii) [1.0048/ 1.0040]ⁿ = 86.5/70.0


iv) n log (1.0048 / 1.0040) = log ( 86.5/70)


v) n = log (86.5/70) / log (1.0048/1.0040) ≈ 266


3) year = 1928 + 266 = 2194


That is in the year 2194

8 0
3 years ago
Read 2 more answers
F represents the fee (in dollars) for climbing d meters.
Grace [21]

Answer:

$12

Step-by-step explanation:

when d = 0,  F = 110

when d = 100, F = 110 + (0.12 x 100) = 122

when d = 200, F = 110 + (0.12 x 200) = 134

etc.

Therefore, increase in price for every 100 meters climbed = 134 - 122 = 122 - 110 = 12

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2 years ago
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The area of a football field can be calculated
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The Constant of Proportionality from the following equation is:<br> y= 7/9x
Ilia_Sergeevich [38]

Answer:

k = \frac{7}{9}

Step-by-step explanation:

The equation of proportionality is

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y = \frac{7}{9} x ← is in this form

with k = \frac{7}{9}

5 0
2 years ago
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