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4 years ago

15x110=(15x100)+(15xn)

2 answers:

8 0

The answer is n=10 because 15x110=1650 so (15x100)+(15xn) has to equal 1650. 15x100=1500
So you subtract 1650-1500 and it gives you 150, so you divide 150 divided by 15 and it equals 10,so the answer is 10

Sonbull [250]4 years ago

5 0

Your answer is n=10. I hope it helped

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3 years ago

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3 years ago

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3 years ago

patricia says that it's more appropriate to use the method of factoring than extracting square roots in solving 4x2^-9=0. do you

zavuch27 [327]

$1^{o} \\ \\ 4x^{2}-9=0 \\ \\ (2x-3)(2x+3)=0 \\ \\ 2x-3=0 \ \vee \ 2x+3=0 \\ \\ 2x=3 \ \vee \ 2x=-3 \\ \\ x= \frac{3}{2} \ \vee \ x=- \frac{3}{2} \\ \\ 2^{o} \\ \\ 4x^{2}-9=0 \\ \\ 4x^{2}=9 \\ \\ x^{2}= \frac{9}{4} \\ \\ x= \sqrt{ \frac{9}{4} } \ \vee \ -\sqrt{ \frac{9}{4} } \\ \\ x= \frac{3}{2} \ \vee \ x=- \frac{3}{2} \\ \\ 3^{o} \\ \\ 4x^{2}-9=0 \\ \\ \Delta=0^{2}-4*4*(-9)=144 \\ \\ \sqrt{\Delta} =12 \\ \\ x_{1}= \frac{0+12}{8} = \frac{3}{2}$

$x_{2}= \frac{0-12}{8} =- \frac{3}{2}$

8 0

4 years ago

What is -5/6 divided by 9/10? A. -27/25 B. -4/3 C. -3/4 D. -25/27

kakasveta [241]

$-\frac{5}{6}$ ÷ $\frac{9}{10}$

First, apply the rule (easiest way if you have learned it): $a$ ÷ $\frac{b}{c} = a$ × $\frac{c}{b}$
$- \frac{5}{6}$ × $\frac{10}{9}$
Second, apply the last rule: $\frac{a}{b}$ × $\frac{c}{d} = \frac{ac}{bd}$
$- \frac{5*10}{6*9}$
Third, multiply 5 × 10 to get 50.
$- \frac{50}{6*9}$
Fourth, multiply 6 × 9 to get 54.
$-\frac{50}{54}$
Fifth, find the GCF of 50 and 54.
The GCF should be 2.
Sixth, divide the numerator by the GCF.
$50$ ÷ $2 = 25$
Seventh, divide the denominator by the GCF.
$54$ ÷ $2 = 27$
Eighth, now put 25 and 27 together to get the simplified fraction.
$- \frac{25}{27}$

Answer as fraction: $-\frac{25}{27}$
Answer as decimal: 0.9259

7 0

3 years ago