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2 years ago

8 years from now, bella will be 50% older than she is now. how old is Bella?

Mathematics

2 answers:

nlexa [21]2 years ago

8 0

She will be 12 bc 50% is how old she is now is 4 so add 4+8 which gives you 12.

Brrunno [24]2 years ago

5 0

8 divides by 50% would equal 16. Or logically, 50% is half of 100, so 2 times 8 equals 16.

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Which expression is equivalent to 3x - (2x + 4) + 5? x+1 x + 9 5x + 9 5x + 1

azamat

Answer:

x + 1

Step-by-step explanation:

3x - (2x + 4) + 5

3x - 2x - 4 + 5

x - 4 + 5

x + 1

7 0

2 years ago

Can someone help please

crimeas [40]

Answer is 5 because the other sides are 9 each

7 0

2 years ago

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Subtract – 2.2 + 3x – 9 from 8x2 + 10x – 10.

Ksju [112]

Answer:

=3x−11

2(4x2+5x−5)

Step-by-step explanation:

both subtracted: −8x2−7x−1

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2 years ago

Find the zeros of polynomial function and solve polynomials equations. f(x)=24x^3-64x^2-21x+56

8090 [49]

Since this polynomial has 4 terms, factoring by grouping should be the first thing we try here.

So, we have:

$8x^2(3x-8)-7(3x-8)=0 \implies\\ (8x^2-7)(3x-8)=0$

So, we can use ZPP to find out roots:

$3x-8 =0 \implies\\ x=\frac{8}{3}\\ 8x^2-7=0 \implies \\ 8x^2=7 \implies \\ x^2=\frac{7}{8} \implies \\ x=\pm\frac{\sqrt{7}}{\sqrt{{8}}}\\ \text{Rationalizing denominator:}\\ x=\pm\frac{\sqrt{56}}{8}$

So our three roots are:

$x \in \{\frac{8}{3},\frac{\sqrt{56}}{8},-\frac{\sqrt{56}}{8}\}$

8 0

2 years ago

Complete the square for the expression, then factor the trinomial.

Nuetrik [128]

Answer:

Completing the square we get: $(x-2)^2-(2)^2$

and factoring the term we get: $x(x-4)$

Step-by-step explanation:

We need to complete the square for the expression $x^2-4x$

For completing the square the expression would be of form $a^2+2ab+b^2=(a+b)^2$

For given expression we have to add (2)^2 and subtract to make it complete the square.

$x^2-2(x)(2)+(2)^2-(2)^2\\(x-2)^2-(2)^2$

Now, we have to factor the polynomial using formula $(a)^2-(b)^2=(a-b)(a+b)$

So, $(x-2)^2-(2)^2\\=(x-2-2)(x-2+2)\\=(x-4)(x-0)\\=x(x-4)$

Completing the square we get: $(x-2)^2-(2)^2$

and factoring the term we get: $x(x-4)$

5 0

2 years ago