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2 years ago

What is 8a^3b^-2 when a=4 and b=-5

Mathematics

2 answers:

Softa [21]2 years ago

7 0

8(4)^3=512 5^-2= 1/25

tiny-mole [99]2 years ago

5 0

8a $a^{3} +3b-2$
= 8x $4^{3} -3x(-5)-2$
= 64x8+15-2
=192+13
205

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nasty-shy [4]

Answer:

Step-by-step explanation:

{y2+8y−128=0x=34⋅(y+4) ... The two right triangle are similar, so: BDAB=DEAC. From this, I obtain: ... AC=3x AB=4x (3x)²+(4x)²=225 x=3 BD=8 AB/AC=BD/DE 12/9=8/DE DE=6.

8 0

3 years ago

You are planning on applying to the Knirhsdaeh institute as a psychology counselor. They hire millions of psychologists around t

elena-14-01-66 [18.8K]

Answer:

The 98% of the confidence interval for the true average salary of Knirhsdaeh employees as a psychology counselor

(75.4206, 86.5794)

Step-by-step explanation:

Step(i):-

Given that the mean of the sample = $81 k

Given that the size of the sample 'n' = 23

Given that the standard deviation for the salaries is $13 k

Step(ii):-

98% of the confidence interval for the true average salary of Knirhsdaeh employees is determined by

 $(x^{-} - t_{0.02} \frac{S.D}{\sqrt{n} } , x^{-} + t_{0.02} \frac{S.D}{\sqrt{n} })$ 

Degrees of freedom = n-1 = 23-1 =22

 $t_{0.02} = 2.5083$ 

$(81 - 2.0583 \frac{13}{\sqrt{23} } , 81 + 2.0583 \frac{13}{\sqrt{23} } )$

( 81 - 5.57940 , 81 + 5.57940)

(75.4206, 86.5794)

Final answer:-

The 98% of the confidence interval for the true average salary of Knirhsdaeh employees as a psychology counselor

(75.4206, 86.5794)

7 0

3 years ago

Will you guys help me please

marusya05 [52]

How you do this is you go from left to right with each one, and figure out which number is greater. For this particular problem the answer will be,

1.2 1.23 2.31 3.2

7 0

2 years ago

Read 2 more answers

Quadrilateral qrst is a square what is pst

hodyreva [135]

if QRST is indeed a quadrilateral, then, Check the picture below.

3 0

2 years ago

−3(3+x)+4(x−6)=−4. please I need this now

nalin [4]

Answer:

x=29

Step-by-step explanation:

−3(3+x)+4(x−6)=−4

(−3)(3)+(−3)(x)+(4)(x)+(4)(−6)=−4(Distribute)

−9+−3x+4x+−24=−4

(−3x+4x)+(−9+−24)=−4(Combine Like Terms)

x+−33=−4

x−33=−4

Step 2: Add 33 to both sides.

x−33+33=−4+33

x=29

I hope this helps

7 0

2 years ago