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Setler79 [48]
3 years ago
15

Find an expression equivalent to 18+30

Mathematics
2 answers:
meriva3 years ago
6 0

Answer:

2(9+15)

Step-by-step explanation:

18 + 30 = 2(9+15)

Jet001 [13]3 years ago
4 0

Answer:

2(9 + 5)

Step-by-step explanation:

9 * 2 = 18

5 * 2 = 10

It is kind of similar to distributive property, but isn't the same.

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If u=0, make t the subject of the following equation: s=ut+1/2at^2 Please look at image.
Sladkaya [172]

Answer:

t=\sqrt{\dfrac{2s}{a}}

Step-by-step explanation:

The given equation is :

s=ut+\dfrac{1}{2}at^2

Where

s is displacement

u is the initial velocity

a is acceleration

t is time

If u = 0, the above equation become,

s=\dfrac{1}{2}at^2\\\\t^2=\dfrac{2s}{a}\\\\t=\sqrt{\dfrac{2s}{a}}

Hence, the value of t is equal to \sqrt{\dfrac{2s}{a}}.

4 0
3 years ago
Write the following decimal number in its equivalent fraction form.
Alecsey [184]

Answer:

-0.6666.... = - \frac{2}{3}

Step-by-step explanation:

Repeating decimals can be written as either 0.6666..., or as 0.6 with a small line over the top of the 6 to indicate it repeats.  Repeating fractions are not put into fractions in the traditional way.  If we had the terminating decimal 0.4, then we know to put the 4 over 10 and reduce:

\frac{4}{10}=\frac{2}{5}

However, with repeating decimals, instead of putting the number of the decimal over a value of 10, we put it over a value of 9.  So, for the equivalent fraction form of -0.6 (repeating) we would get:

\frac{6}{9}=-\frac{2}{3}

4 0
3 years ago
Factor the polynomial 21y^5 − 14y^3 − 3y^2 + 2 completely.
xxTIMURxx [149]
7y^3(3y^2-2)-(3y^2-2)

(3y^2-2)(7y^3-1)
4 0
4 years ago
Please help I'll mark brainliest​
NISA [10]

Answer:

470?

Step-by-step explanation:

I am not fully sure of the answer

7 0
3 years ago
Read 2 more answers
For each equation, determine whether it has no solutions, exactly one solution, or is true for all values of x (and has infinite
nignag [31]

Answer:

  • Equation 1 has exactly one solution.
  • Equation 2 has infinitely many solutions.
  • Equation 3 has no solution.

Step-by-step explanation:

We are given three equations to solve. First, let's solve the equations for x.

<u>Equation 1</u>

<u />\displaystyle{6x+8=7x+13}\\\\7x + 13 = 6x + 8\\\\x + 13 = 8\\\\\bold{x = -5}<u />

Therefore, we determined that for the first equation, x = -5. We can check our solution by substituting it back into the original equation.

\displaystyle{6(-5)+8=7(-5)+13}\\\\-30 + 8 = -35 + 13\\\\-22 = -22 \ \checkmark

Since we got a true statement, there are no other values of x for which we get a true statement. Let's test this with the opposite value: positive 5.

6(5)+8=7(5)+13\\\\30 + 8 = 35 + 13\\\\38 = 48 \ \text{X}

Therefore, for Equation 1, there is exactly one solution.

<u>Equation 2</u>

<u />6 x + 8 = 2 ( 3 x + 4 )\\\\6x + 8 = 6x + 8\\\\0 + 8 = 8\\\\8 = 8 \ \checkmark<u />

We get a true statement by solving for x (which ends up canceling out of the equation entirely). Therefore, we can check <u>any value</u> in place of x to see if we get a true statement. For this instance, I will use -3.

6(-3) + 8 = 2 ( 3(-3) + 4 )\\\\-18 + 8 = 2(-9+4)\\\\-18 + 8 = 2(-5)\\\\-18 + 8 = -10\\\\-18 = -18 \ \checkmark

We still get a true statement, so Equation 2 has infinitely many solutions.

<u>Equation 3</u>

<u />6 x + 8 = 6 x + 13\\\\0 + 8 = 13\\\\8 \neq 13<u />

We get a false statement. Therefore, Equation 3 has no solution.

3 0
3 years ago
Read 2 more answers
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