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Amiraneli [1.4K]
3 years ago
7

Simplify -4(6x - 7) – 3(4 + 2x).40x - 4030x + 40-30X + 16-40x + 16​

Mathematics
2 answers:
USPshnik [31]3 years ago
4 0
-30x + 16. You use the distributive property to get -24x + 28 -12 -6x. Then combine like terms to get -30x + 16.
vitfil [10]3 years ago
4 0
So you have
-4(6x-7)-3(4+2x)
1.) distributive property

-24x+28-12-6x

2.) combine like terms -24x-6x to get -30x

-30x+28-12
3.) combine 28-12 to give you
-30x+16
The answer is the third choice. Hope this helps!!! :)

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1/10 ton of sand to 4/5. What is the ratio in ton per minute?
g100num [7]

1/10 4/5 we need common denominaters so

1/10 4(2)/(5)= 8/10

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4 years ago
Pleasee help me i hate graphs xD
Inga [223]

Answer:

8.54 units (3s.f.)

Step-by-step explanation:

Distance between 2 points

=   \sqrt{(y1 - y2)^{2}  +  {(x1 - x2)}^{2} }

Identify the coordinates of the 2 endpoints of the line:

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Using the distance formula above,

length of line segment

=  \sqrt{[5 - ( - 3)]^{2}  + [ - 5 - ( - 2)]^{2} }  \\  =  \sqrt{ {(5 + 3)}^{2}  + ( -5 + 2)^{2} }  \\  =  \sqrt{ {8}^{2} +  {( - 3)}^{2}  } \\  =  \sqrt{73}  \\  = 8.54 \: units \: (3 \: s.f.)

3 0
3 years ago
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At a place 11 Friends met together and they shook their hands. how many hand-shakings did they do?​
dybincka [34]

Answer:

121

Step-by-step explanation:

Because every one of them shook with each other and one person shook 11 times so 11 into 11 is 121.

7 0
3 years ago
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Please answer this with full explanation.​
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Step-by-step explanation:

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2 years ago
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How much does a sleeping bag cost? Let's say you want a sleeping bag that should keep you warm in temperatures from 20°F to 45°F
Ira Lisetskai [31]

Answer:

a) x = 80.40

s = 29.54

b) lower limit = 69.53

upper limit = 91.27

Step-by-step explanation:

The mean price is:

\bar X=\frac{1}{n}\sum x_i=\frac{1}{20}(50+80+...+70)=\frac{1608}{20} =80.40

The standard deviation is

s=\sqrt{\frac{1}{n-1}\sum(x_i-\bar X)^2}=\sqrt{\frac{1}{19}[(50-80.4)^2+...+(70-80.4)^2]} \\\\s=\sqrt{\frac{15,471}{19} }=\sqrt{814.25} =29.54

We have to calculate a 90% CI for the mean.

The z-value for a 90% confidence interval is z=1.645.

The margin of error is:

E=z\cdot \sigma / \sqrt{n}=1.645*29.54/\sqrt{20}=48.59/4.47=10.87

The 90% CI is

\bar X-z\sigma/\sqrt{n} \leq \mu \leq \bar X-z\sigma/\sqrt{n}\\\\80.40-10.87 \leq \mu \leq 80.40+10.87\\\\69.53\leq \mu \leq 91.27

4 0
4 years ago
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