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Bond [772]
2 years ago
8

Which expression is equivalent to 2^4 ⋅ 2^−7?

Mathematics
1 answer:
skad [1K]2 years ago
3 0

2^4 x 2^-7 = 0.125

2^3 = 8, 1 /8 = 0.125


 answer is B

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Solve 5x^2+2x=1 using either factoring, square root method, completing the square or quadratic formula.
wolverine [178]

Answer:

x = -1 ± √6 / 5

Step-by-step explanation:

Solve 5x^{2} + 2x = 1

move 1 to the left side of the equation by subtracting it from both sides.

5x^{2} + 2x - 1 = 0

Use the quadratic formula to find the solutions.

-b± \sqrt{b^2 - 4 (ac)}/ 2a

Substitute the values a = 5 , b = 2, and c = -1 into the quadratic formula and solve for x

-2±\sqrt{2^2 - 4(5 - 1)}/ 2 ⋅ 5

Simplify.

x = -2 ± 2 \sqrt{6}/ 10

x = -1 ± \sqrt{6}/ 5

Exact Form:

x = -1 ± \sqrt{6}/ 5

4 0
3 years ago
Round 1.965 to the nearest tenth.
riadik2000 [5.3K]

Answer: 2

Step-by-step explanation:

5 0
3 years ago
In a recipe mike uses 4 cups of brown sugar for every 3 cups of flower. What is ratio of flour to brown sugar SIMPLEST FORM.
kicyunya [14]

Answer:

3:12 = 1:4

Step-by-step explanation:

3 cups of flour = 4 cups brown sugar

4 x 3 = 12

3:12 = 1:4 (simplest form)

5 0
2 years ago
What is 20% of 50 (show work)
seraphim [82]
X/50 = 20/100 

its takes adding 30 to 20 to get to 50 so add 30 to 100 then its 130/100 (130 over 100) and then divide that and its 13 = 13%

i think its right dont hold it against me if im wrong

8 0
3 years ago
What part of an hour passes between 11:24 am and 415 am
Bas_tet [7]

Using proportions, it is found that 1685% of an hour passes between 11:24 am and 415 am.

<h3>What is a proportion?</h3>

A proportion is a fraction of a total amount, and the measures are related using a rule of three. Due to this, relations between variables, either direct or inverse proportional, can be built to find the desired measures in the problem.

One hour is composed by 60 minutes. Between 11:24 am and 4:15 am, there are 16 hours and 51 minutes, hence the number of minutes is given by:

M = 16 x 60 + 51 = 1011 minutes.

As a percentage of one hour = 60 minutes, we have that this measure is:

1011/60 x 100% = 1685%.

Hence 1685% of an hour passes between 11:24 am and 415 am.

More can be learned about proportions at brainly.com/question/24372153

#SPJ1

4 0
1 year ago
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