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3 years ago

5

HELP MEH I DONT GET IT IM DUMBBBBBBB

1 answer:

Luda [366]3 years ago

3 0

Number 10.) is zero property of multiplcation.

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Work out the difference, in minutes, between 2 hour 2 minutes and 1 1/2hours.

Natali [406]

Answer: 32 minutes

Step-by-step: 2-1=1

60 -30=30

30+2= 32

8 0

3 years ago

Shelby is following a recipe to make punch for her party. the recipe calls for 5 cups of juice for every 2 cups of soda. how man

Zigmanuir [339]

The equation for this problem would be 56=2x+5x, which can be simplified to 56=7x, x being the number of cups of soda. To find x you must get it alon be dividing both sides by 7 (56/7=7x/7). Doing this gives you 8=x, or in other words 8 cups of soda.
Hope this helps!

5 0

4 years ago

Find the standard deviation of the distribution in the following situations. (Round your answers to two decimal places.) (a) MEN

Arturiano [62]

Answer:

a) 15.579

b) 39.019

Step-by-step explanation:

a) For the top 2% the z-value from the z table

z = 2.054

thus,

z = $\frac{\textup{X-Mean}}{\sigma}$

here

X = 132

Mean = 100

thus,

2.054 = $\frac{\textup{132-100}}{\sigma}$

or

σ = 15.579

b) Using tables, we get for Z = 0.89 the value of 0.8133 and for Z= 0.90 the value of 0.8159

By interpolation, values for 0.815 and we get Z=0.897

thus,

z = $\frac{\textup{X-Mean}}{\sigma}$

here

X = 220

Mean = 185

thus,

0.897 = $\frac{\textup{220-185}}{\sigma}$

or

σ = 39.019

6 0

3 years ago

There are 108 identical plastic chips numbered 1 through 108 in a box. What is the probability of reaching into the box and rand

kolezko [41]

• 108 total plastic chips
• #chip > 44 = 108 - 44 = 64 chips
• 64 chips / 108 chips total
• That simplifies to: 16/27 probability

8 0

3 years ago

I want help its urgent!!! <br><br>(iv), (v), (vi) Questions

Artist 52 [7]

Solution:

iv) Given equation: $x^{2} - y^{2} - 4x - 2y + 3$

Since we are given two variables, we need to split the original expression into two quadratic expressions as

$x^{2} - 4x + 4 - y^{2} - 2y - 1$

Factoring x first:

$x^{2} - 4x + 4 =$ $x^{2} - 2x - 2x + 4$

= $x (x - 2) - 2 (x-2)$

= $(x-2)(x-2)$

$= (x-2)^{2}$

Factoring y now:

$-y^{2} - 2y - 1 = -1(y^{2} + 2y + 1)$

= $-1(y^{2} + y + y + 1)$

= $-1[ y(y+1) + 1(y+1)]$

= $-1 [(y+1)(y+1)]$

= $(y+1)(-y-1)$

Therefore, the original expression becomes

$(x-2)^{2}+(y+1)(-y-1)\\or \\(x-2)(x-2) + (y+1)(-y-1)$

7 0

3 years ago