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lisabon 2012 [21]
3 years ago
5

Multiply Which one ??? Please help

Mathematics
1 answer:
vladimir1956 [14]3 years ago
7 0

Answer:

The 3rd one again

Step-by-step explanation:

(a+−2)(8a^{2}+−5a+3)

=(a)(8a^{2})+(a)(−5a)+(a)(3)+(−2)(8a^{2})+(−2)(−5a)+(−2)(3)

=8a^{3}−5a^{2}+3a−16a^{2}+10a−6

=8a^{3}−21a^{2}+13a−6

hope this helped:)

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How would I find angle B for this bridge? What formula would I use?
astraxan [27]
The bridge attached is drawn according to given dimensions, and it doesn't look right.  Please double check the given dimensions.

Calculations:
Horizontal part of bottom chord below the 70 degree triangle 
= 15.1*cos(70) = 5.16  (which is a major prt of the 6.3 units.
Height of vertical pieces DF and EH
= 15.1*sin(70) = 14.19
Note that structurally, DF and EH do not help in reducing stress on the bridge, since they are perpendicular to the bottom chord.

Therefore 
angle B = atan(14.19/(6.3-5.16))=85.41 degrees

I believe the whole geometry does not look right, esthetically, and structurally, since the compression members are much longer than the tension members in the middle.  (The vertical members carry no force.) 
If  you can review the input data, or post a new question, I will be glad to help.

4 0
3 years ago
Read 2 more answers
Solve the equation.<br> 2/3b - 1/3b +12= 16
Elena-2011 [213]

Answer:

b=1/12 or just 12

Step-by-step explanation:

combine like terms

1/3b +12=16

subtract 12 on both sides

1/3b=4

divided both sides with 1/3

b= 12 or 1/12

hope this helps.. :/

8 0
3 years ago
Please help!! giving brainlest , please be serious. due in a few minutes thanks!
Margaret [11]

The answer is -7

The arrows both point toward the left side, and sine there are seven spaces the arrows are going through, you subtract 7 spaces and get -7

Hope that helps.

7 0
2 years ago
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janelle has $75. She buys jeans that are discounted 30% and then uses an in-store coupon for $10 off the discounted price. After
kicyunya [14]

If you want to the know the total price of the jeans, with discount coupon and sales tax then it's $15.76

$75 x 0.30 = $22.50

$22.50 - $10 = $12.50

$12.50 + $3.26 = $15.76

7 0
3 years ago
Please help will give branliest! Find the two missing sides and write your answer as in simplified radical form.
hjlf

Answer: v = u= 2 \sqrt{2}

Step-by-step explanation:

v= cos45 * 4= 2 \sqrt{2}

- Apply Pythagorean theorem

4^{2}= (2\sqrt{2}) ^{2} + u^{2}

We have u = 2 \sqrt{2}

5 0
3 years ago
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