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2 years ago

Name the property illustrated (7+8)+9=7+(8+9) I need help plz

Mathematics

1 answer:

Svetllana [295]2 years ago

3 0

Answer:

i believe it is associative property

Step-by-step explanation:

hope this helps, sry if im wrong

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The answer to 20+50 is 72

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3 years ago

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Solve 12^2+5x-4 =12^2x+6

torisob [31]

answer I got was x=6/139 or x=-0.0431655

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4 years ago

Hi. Please I need help with these questions.

ElenaW [278]

Answer:

Q 12 roots of the equation

$2x^{2} -6+1=0 \\= (x-\frac{\sqrt{10} }{2})(x+\frac{\sqrt{10} }{2})\\$

∝ = $\frac{\sqrt{10} }{2}$

β = $-\frac{\sqrt{10} }{2}$

no matter if u oppose the root

(i) 2( $\frac{\sqrt{10} }{2}$ ) $(-\frac{\sqrt{10} }{2} )^{2}$ +2 $(\frac{\sqrt{10} }{2} )^{2}$ ( $-\frac{\sqrt{10} }{2}$ )+2(

(ii)( $(\frac{\sqrt{10} }{2})^{2}$ - 3 ( $\frac{\sqrt{10} }{2}$ )( $-\frac{\sqrt{10} }{2}$ ) + ( $(-\frac{\sqrt{10} }{2})^{2}$ ) = $\frac{25}{2}$

Q 13 roots of equation

$4x^{2} -3x-4=0\\\alpha = -0.693\\\beta = 1.443$

the roots of the second equation are

x1 = 1/3(-0.693) = -0.231

x2 = 1/3(1.443) = 0.481

the equation is

(x+0.231)(x-0.481)=0

$x^{2}-\frac{1}{4} x-\frac{1}{9}$

4 0

3 years ago

Evaluate the expression when a = 4, b=8 and c=12 4(a+b)-c<br>

a_sh-v [17]

Answer:

Step-by-step explanation:

4(a+b)-c

4(4)+4(8)=16+32-12

48-12=36

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3 years ago

Question 3 of 18

iren [92.7K]

Answer:

D. 0.74.

Step-by-step explanation:

It is a BINOMIAL trial, which means that there are only two outcomes: either success, or failure.

So, if the probability of success is 0.26, the probability of failure will be 1 - 0.26 = 0.74.

Hope this helps!

4 0

3 years ago