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Paraphin [41]
4 years ago
15

Solve for x 4 (x – 7) = -8

Mathematics
2 answers:
daser333 [38]4 years ago
6 0
It should be 5. When you distribute the 4, it turns into 4x then (4•-7) = -28. Add 28 to -8 and you get 20. Divide 4 on Both sides and X=5
Lyrx [107]4 years ago
3 0

Answer:x=4

Step-by-step explana

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The ratio of the number of volleyball to the number of basketballs in the P.E room is 4:7 .there are 21 basketballs . How many v
densk [106]
Let volleyball be v and let basketball be b.

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8 0
3 years ago
Which expression is equivalent to StartFraction (3 m Superscript negative 1 Baseline n squared) Superscript negative 4 Baseline
koban [17]

Answer:

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Step-by-step explanation:

Given the expression \frac{(3m^{-1}n^{2})^{-4}   }{(2m^{-2}n)^{3}  }, we will use laws of indices to get the equivalent expression as shown below;

According to one of the law of indices,

\frac{a^{m} }{a^{n} } = a^{m-n}  \ and\ (a^{m})^{n} = a^{mn}

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8 0
3 years ago
Read 2 more answers
Dan buys a car for £2700.
BartSMP [9]

Answer:

The car will be worth £2516.22 in 5 years

Step-by-step explanation:

The rule of depreciating is  

A=P(1-r)^{t}, where

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  • <em>P</em> is the original value
  • <em>r</em> is the rate in decimal
  • <em>t</em> is the time in years

∵ Dan buys a car for £2700

∴ <em>P</em> = 2700

∵ It depreciates at a rate of 1.4% per year

∴ <em>r</em> = 1.4% = 1.4/100 = 0.014

∵ We need to find how much it will be worth in 5 years

∴ <em>t</em> = 5

→ Substitute all of these values in the rule above to find A

∵ A=2700(1-0.014)^{5}

→ Use your calculator to find the answer

∴ <em>A</em> = 2516.22

∴ The car will be worth £2516.22 in 5 years

7 0
3 years ago
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