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bogdanovich [222]
3 years ago
11

Somebody help on number 7 please. Thanks

Mathematics
1 answer:
Tatiana [17]3 years ago
8 0
42. because. 12
+30
=42
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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
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Riley brought cupcakes to a party. by the end of the party 5/6 of the cupcakes were gone. what fraction of the cupcakes were lef
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Answer:

1/6

Step-by-step explanation:

this seems too simple but...

6/6 would be all the cupcakes the whole

so if 5/6 are gone than

1/6 are left

8 0
2 years ago
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What are the factors of -20 that have a sum of -1
qaws [65]

Answer:

The factors of -20 are:

1, 2, 4, 5, 10, 20

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Step-by-step explanation:

6 0
2 years ago
Larry says 5×900 is less than 5×9000 is greater than 9000​
Ne4ueva [31]

Answer:

???? i dont understand

Step-by-step explanation:

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3 years ago
Help please<br><br> 2+2-1-1+6=x
natita [175]

Answer:

2+2-1-1+6=x : x = 8

Step-by-step explanation:

2+2-1-1+6=x\\

Switch sides:

x=2+2-1-1+6

Add/Subtract the numbers: 2+2-1-1+6=8

x = 8

Hope I helped, if so may I get brainliest and a thanks?

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3 years ago
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