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3 years ago

What value of m makes this a true number sentence? m+3+m=3

Mathematics

1 answer:

MrRa [10]3 years ago

8 0

The correct value for m is 0(zero). :)

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Write an inequality that represents each sentence.

ivann1987 [24]

1. Julia's ≤ Rachel's hair

2. 40 < 74

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3 years ago

What are the real zeros of x^3+4x^2-9x-36

Katyanochek1 [597]

Answer:

$x = -4\\x = -3\\x = 3$

Step-by-step explanation:

To find the real zeros you must match the function to zero and factor the expression.

We have a polynomial of degree 3.

We try to group the terms to perform the factorization

$x ^ 3 + 4x ^ 2-9x-36 = 0\\\\x ^ 2(x + 4) - 9(x + 4) = 0$

Now we take (x + 4) as a common factor

$(x + 4)(x ^ 2 -9) = 0$

If we have an expression of the form $(a ^ 2-b ^ 2)$ we know that this expression is equivalent to:

$(a ^ 2-b ^ 2) = (a + b)(a-b)$

In this case

$a = x\\b = 3$

So:

$(x ^ 2 -9) = (x + 3)(x-3)$

Finally:

$x ^ 3 + 4x ^ 2-9x-36 = (x + 4)(x + 3)(x-3) = 0$

The solutions are:

$x = -4\\x = -3\\x = 3$

6 0

3 years ago

If a roof is 30ft 4 in wide & 52 ft 9 in long with 3 inches of water trapped on the roof. how many gallons are trapped on th

Anarel [89]

Answer:

42,069

Step-by-step explanation:

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3 years ago

Evaluate the expression (25^-3/2)^1/3

Brilliant_brown [7]

Answer:

1/5

Step-by-step explanation:

To avoid ambiguity, your negative exponent -3/2 should be enclosed in brackets or parentheses, as should your exponent 1/3:

( 25^[-3/2] )^ (1/3)

This is equivalent to:

(√25)^(-3)· (1/3), or

5^(-1), or 1/5.

8 0

3 years ago

Read 2 more answers

For the past three months Grace used her cell phone for 43 minutes 62 minutes and 57 minutes how many minutes would you have to

RSB [31]

Answer:

Grace should use her phone for 58 minutes to maintain an average of 55 minutes.

Step-by-step explanation:

Usage of first month = 43 minutes

Second month = 62 minutes

Third Minutes = 57 minutes

Let, the usage of fourth month = k minutes

Mean of the data = 5 minutes

Now, Average of a Data = $\frac{\textrm{Sumof observations}}{\textrm{Total number of observations}}$

⇒ $55 = \frac{43 + 62 + 57 + k}{4}$

or, 55 x 4 = 162 + k

⇒ 220 - 162 = k

or, k = 58 minutes

So, Grace should use her phone for 58 minutes to maintain an average of 55 minutes.

5 0

3 years ago