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2 years ago

11

Help plz. 6th grade math

2 answers:

evablogger [386]2 years ago

6 0

Answer:

2.5z^2+3z+4.2

Step-by-step explanation:

ArbitrLikvidat [17]2 years ago

5 0

I’m not quite sure what the question is but i’m guessing you need to simplify, if not lemme know and i’ll try help.

first combine the squared terms which is 1.5z^2+z^2= 2.5z^2

second combine the z terms
6z-3z=3z

then combine the numerical terms
4.5-0.3=4.2

so simplified that equation is
2.5z^2 + 3z + 4.2

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You have entered a pie baking contest. In the contest, you must make several pies for the judges to taste. You will make your fa

andreyandreev [35.5K]

Answer:

x=2.5 cups are needed for 2 pies

Step-by-step explanation:

4/5 or 0.8

Fraction form: 4/5x = 2 x= 5/4

Decimial form: 0.8x = 2 x = 2.5

Mixed number form: 2 1/2

Hope that helped :)

8 0

2 years ago

What's is an equation of the line that passes through the point(-3,-1) and is perpendicular to the line x-2y=6

katrin2010 [14]

Answer:

$y+1=-2(x+3)$

Step-by-step explanation:

Slope is negative reciprocal when two lines are perpendicular

m1=1/2 therefore m2=-2

The equation of the line in point-slope form is given as

$y-y_1=m_2(x-x_1)$

Here m=-2 and (x1, y1)=(-3, -1)

Therefore,

$y+1=-2(x+3)$

6 0

3 years ago

15+x<24 what is the solution to this inequality

ra1l [238]

Move all terms not containing x to the right side of the inequality. x < 9

5 0

3 years ago

( 4.2 + 3 ) + (5.7 x - 2 ) + ( 5 — 2.6 x)

White raven [17]

Answer is 10.2 + 3.1x
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5 0

3 years ago

7. The probability that a randomly chosen student will be left-handed is .09: a) In a class of 108, find the probability that th

vampirchik [111]

Solution :

Let x be student will be left handed

P = 0.09

Using the normal approximation to binomial distribution,

a). n = 108,

μ = np = 9.72

$\sigma = \sqrt{np(1-p)}$

$=\sqrt{8.8452}$

= 2.9741

Required probability,

P(x=8) = P(7.5 < x < 8.5)

$=P\left(\frac{7.5-9.72}{2.9741}< \frac{x-\mu}{\sigma}< \frac{8.5-9.72}{2.9741}\right)$

$=P(-0.75 < z < -0.41)$

Using z table,

= P(z<-0.41)-P(z<-0.75)

= 0.3409-0.2266

= 0.1143

b). P(x=12) = P(11.5 < x < 12.5)

$=P\left(\frac{11.5-9.72}{2.9741}< \frac{x-\mu}{\sigma}< \frac{12.5-9.72}{2.9741}\right)$

$=P(0.60 < z < 0.94)$

Using z table,

= P(z< 0.94)-P(z< 0.60)

= 0.8294 - 0.7257

= 0.1006

7 0

3 years ago