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3 years ago

How can you decide which operation to use to solve a problem?

Mathematics

1 answer:

almond37 [142]3 years ago

7 0

Answer:

it you're asking for like an equation like "4x +3 = 15 " then you do the opposite of what the equation is doing. Basically undoing the problem to get back to the roots of it. like for the example i provided you would subtract 3 from both sides, because it was added originally. then you would divide both sides by 4 because originally you were multiplying.

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Down to the nearest whole number 8.36

almond37 [142]

First we take the number as it is. Second, we look at the last number. 6 is rounds up to ten which rounds the 3 up to a 4. So now we come up with 8.4, but that isn't a whole number. We can then round 4 to 0 because it's closer to 0 on a number line. Now, our answer is 8.0, but, in order to have a whole number, we can't have any decimals. we can, then, take away the 0 and the decimal, which leaves us 8, and 8 is a whole number; we can now say the answer is 8. :)

4 0

3 years ago

Read 2 more answers

How are 4:5 and 8:10 equivalent

Paraphin [41]

Answer:

Hello!!! Princess Sakura here ^^

Step-by-step explanation:

They are equivalent because if you take the 8 and divide it by the 4 you'll get 2. Then if you take the 10 and divide it by the 5 you'll get 2 again.

4 0

3 years ago

Read 2 more answers

Hurrry help number is chosen at random form 1 to 50 find the probiotic of selecting prime numbers

Paul [167]

Answer: $\frac{3}{10}$ or 30%

Step-by-step explanation:

We will divide the wanted outcomes by the possible outcomes.

$\displaystyle \frac{\text{wanted outcomes}}{\text{possible outcomes}} =\frac{\text{number of prime number}}{\text{number of numbers 1 through 50}} =\frac{15}{50}=\frac{3}{10}\;\; \text{or 30\%}$

The prime numbers from one through fifty are; 2, 3, 5, 7, 11, 13, 17, 19, 23, 29, 31, 37, 41, 43, and 47.

-> This is 15 numbers

5 0

2 years ago

What are the zeros of the quadratic function f(x) = 2x2 + 8x – 3?

jenyasd209 [6]

Answer:

$x=-2-\sqrt{\dfrac{11}{2}}\ \text{and}\ x=-2+\sqrt{\dfrac{11}{2}}$

Step-by-step explanation:

My favorite way to go at this is to look at a graph. It shows the vertex at (-2, -11). Since the leading coefficient is 2, this means the roots are ...

$-2\pm\sqrt{\dfrac{11}{2}}$

where the 2 in the denominator of the radical is the leading coefficient.

You can also use other clues:

the axis of symmetry is -b/(2a) = -8/(2(2)) = -2, so answer choices C and D don't work
the single change in sign in the coefficients (+ + -) tells you there is one positive real root, so answer choice B doesn't work.

The first answer choice is the only one with values symmetrical about -2 and one of them positive.

You may be expected to use the quadratic formula:

$x=\dfrac{-b\pm\sqrt{b^-4ac}}{2a}=\dfrac{-8\pm\sqrt{8^2-4(2)(-3)}}{2(2)}\\\\=\dfrac{-8}{4}\pm\dfrac{\sqrt{88}}{4}=-2\pm\sqrt{\dfrac{11}{2}}$

7 0

3 years ago

Find the inequality represented by the graph pleasseee help me

gayaneshka [121]

Answer:

y≥1/2x is the answer for this problem

8 0

3 years ago