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never [62]
3 years ago
10

URGENT this is a question on my precalculus test I need help on. Thank you so much

Mathematics
1 answer:
sp2606 [1]3 years ago
5 0

Answer:

a. 5i + 13j

b. 8i

c. 10i + 6j

Step-by-step explanation:

a. 2i + 6j + 3i + 7j = 5i + 13j

b. 3i + 7j + 5i - 7j = 8i

c. 2i + 6j + 3i + 7j + 5i - 7j = 10i + 6j

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7 times a number is 84 , what is 4 times the number ? A ) 16 B) 28 C) 48 D) 56
liq [111]

Answer:

C. 48

Step-by-step explanation:

first you solve 84 divided by 7 and your answer is 12 then you do 12x4 which is 48

3 0
3 years ago
Read 2 more answers
PLEASE HELP WILL MARK BRAINLIEST
Talja [164]

Answer: -9 for the first one -1440 i think

Step-by-step explanation:

4 0
4 years ago
For accounting purposes, the value of assets (land, buildings, equipment) in a business are depreciated at a set rate per year.
Scrat [10]

Answer:

So, option d is correct i.e,

V₀ = $393,000, b = 0.85, and the value after 7 years is $125,986.80

Step-by-step explanation:

The formula given is V(t)=V₀(b)^t

The value of V₀ (the actual worth) is:

V₀ = $393,000

The value of b is :

b= (1-15%) = (1-0.15) = 0.85

Value of assets after 7 years is:

t= 7, V₀ = $393,000, b=0.85

putting values in formula:

V(t) = Vo(b)^t.

V(7)= $393,000 * (0.85) ^ 7

V(7)= $393,000 * (0.320)

V(7)= $125986.80

So, option d is correct i.e,

Vo = $393,000, b = 0.85, and the value after 7 years is $125,986.80

4 0
3 years ago
Y varies directly as x. If x=7 then y = 56. Find ybwhen x=3
marshall27 [118]

When something varies directly as something else, their ratio of change always stays the same.

56 / 7 = 8

Therefore,

8 * 3 = 24

If x = 3 then y = 24

6 0
3 years ago
20 points 2^-3 * 2^x * 2^x+2
Ivanshal [37]

Apply a law of  exponents. When multiplying you add the exponents:-

2^-3 * 2^x * 2^(x+2)

= 2 ^(-3 + x + x + 2)

=  2^(2x - 1) Answer

8 0
3 years ago
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