3 years ago

Help solving this math

Mathematics

2 answers:

AlexFokin [52]3 years ago

7 0

Answer:

Step-by-step explanation:

Burka [1]3 years ago

6 0

(x+4)(x+5)

Step-by-step explanation:

the factors of 20 which when added is 9 are 4 and 5

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Is <img src="https://tex.z-dn.net/?f=2%5E%7B-3%7D" id="TexFormula1" title="2^{-3}" alt="2^{-3}" align="absmiddle" class="latex-f

TEA [102]

Answer:

Rational

Step-by-step explanation:

$2^{-3}$ simplifies to $\frac{1}{8}$ .

Therefore, it is rational.

$2^{-3}\\\\\text {Apply negative exponent rule: } a^{-n} = \frac{1}{a^n} \\2^{-3}= \frac{1}{2^3}\\ \rightarrow 2^3 = 2*2*2=8\\\boxed{2^{-3}=\frac{1}{8}}$

Brainliest Appreciated.

5 0

3 years ago

7 mark question. The answers on brainly only got me 3 so please help.

Nady [450]

Answer:

See step by step answer

Step-by-step explanation:

the factors are (x+22)(x-10)=0

so x = -22 and 10, but a dimension cannot be negative, so the answer for x is 10 and then if you plug it back in the dimensions are 4 cm, 11 cm and 21 cm.

When you multiply 4 * 11 * 21 = 924, so you know it's correct.

8 0

2 years ago

Find the product. (−x−3)(2x2+5x+8)=

harina [27]

$( - x - 3)(2 {x}^{2} + 5x + 8) = \\ = - 2 {x}^{3} - 5 {x}^{2} - 8x - 6 {x}^{2} - 15x - 24 = \\ = - 2 {x}^{3} - 11 {x}^{2} - 23x - 24$

3 0

3 years ago

Will the sum of 2x3 + x2 - 4 and -5x² - 6x? be a polynomial? yes no

Eva8 [605]

Answer:

Yes

Step-by-step explanation:

Since we are adding two polynomials

The sum will also be polynomial

4 0

3 years ago

N/5 greater than or equal to 11

avanturin [10]

N/5 is greater than 11

5 0

3 years ago