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faust18 [17]
3 years ago
10

Whats the sum of -7x*y + 4x^2 - 2 and 4x'y + 1 - 8x^y?

Mathematics
1 answer:
matrenka [14]3 years ago
8 0

Answer:

-7xy+4x^2-8 and y+1-8x^y

Step-by-step explanation:

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What is the median of this data set? 100,102,103,106,109
liq [111]

The answer is 103 because it’s in the “middle”

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3 years ago
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A carpenter constructed a rectangular sandbox with a capacity of 10 cubic feet. If the carpenter were to make a similar sandbox
jeka57 [31]

Answer:

(D)80 ft³

Step-by-step explanation:

The volume volume of the sandbox is = L × W × H

Where L = Length, W= width, H= Height.

A sandbox has the same shape as a cuboid.

A cuboid is a solid shape with rectangular base and sides. It has six rectangular faces if all sides are closed.

From the question,

LWH = 10ft³ ........................ (1).

If a similar sandbox twice as long, twice as wide and twice as high.

∴ L₍n₎= 2L, W₍n) =2W, H₍n₎ = 2H

Where L₍n₎, W₍n), H₍n₎ is the new Length,  new Width and  new Height of the similar sandbox.

∴L₍n₎ ×W₍n)× H₍n₎  = 2L × 2W × 2H

   and Volume of the new sandbox = L₍n₎ ×W₍n)× H₍n₎

 ⇒Volume of the new sandbox = 2 × 2 ×2 ×L×W×H

     Volume of the new sandbox = 8 × LWH....................(2)

    In equation(1) LWH = 10ft³.

     Substituting the value in equation(2)

    ∴Volume of the new(similar) sandbox= 8 × 10

       =80ft³.

Therefore the capacity of the second sandbox in cubic feet is 80.

The answer is option (D).

     

7 0
3 years ago
X = 4 and y = 3.<br> 3x 2 + 5y<br> A. 27<br> B. 31<br> C. 63<br> D. 159
ryzh [129]

Answer:

39

Step-by-step explanation:

I did the math

8 0
3 years ago
A researcher at a major clinic wishes to estimate the proportion of the adult population of the United States that has sleep dep
Thepotemich [5.8K]

Answer: n = 600.25 ≈ 601 ( sample size)

the minimum sample size of the adults in United State who have sleep deprivation  is 601

Step-by-step explanation:

Given that;

the confidence level = 95% = 0.05

the Margin of error E = 4% = 0.04

∴  level of significance ∝ = 1 - C.L

∝ = 1 - (95/100)

= 0.05

Z∝/2 = 0.05/2 = 0.025

Z-critical value at 95% confidence level is OR level of significance at 0.025 = 1.96 (z-table)

Now to calculate the sample size, we say

n = (Z(critical) / M.E )² P ( 1 - P)

now we substitute

n =  (1.96 / 0.04)² × 0.5 ( 1 - 0.5)

n = 2401 × 0.5 × 0.5

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Therefore the minimum sample size of the adults in United State who have sleep deprivation  is 601

6 0
3 years ago
How to simplify 15+6(x+1)
Trava [24]

15 + 6(x + 1)

Factor a 3 out of the expression.

3(5 + 2(x + 1))

Distribute the 2.

3(5 + 2x + 2)

Combine like terms.

3(7 + 2x)


3(7 + 2x) is your answer.

6 0
3 years ago
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