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3 years ago

Please help me with these problems.

Mathematics

1 answer:

rosijanka [135]3 years ago

7 0

Answer:

17. angle DAB=118º

18. angle DAB=126º

Step-by-step explanation:

The angle A should be 180º-85º-33º(cause the total angle in a triangle is 180º)

So you will get 62º as the angle of A.

And what the question ask is angle of DAB，so again 180º-62º=118º(A straight line is 180º)

Same goes to question 18，use 180º to minus the two angle given，you get 54º ，and then 180ºminus 54º again，the answer is 126º

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2 years ago

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BlackZzzverrR [31]

$\begin{gathered}\\ \sf\longmapsto 11=\frac{8+u}{7.68}\end{gathered}$

$\begin{gathered}\\ \sf\longmapsto 11 = \frac{8 + u}{ \frac{192}{25} } \end{gathered}$

$\begin{gathered}\\ \sf\longmapsto 11=\frac{(8+u)×25}{192}\end{gathered}$

$\begin{gathered}\\ \sf\longmapsto 11=\frac{200+25u}{192}\end{gathered}$

$\begin{gathered}\\ \sf\longmapsto 2112=200+25u\end{gathered}$

$\begin{gathered}\\ \sf\longmapsto 2112-25u=200\end{gathered}$

$\begin{gathered}\\ \sf\longmapsto -25u=200-2112\end{gathered}$

$\begin{gathered}\\ \sf\longmapsto -25u=-1912\end{gathered}$

$\begin{gathered}\\ \sf\longmapsto u=\frac{1912}{25}\end{gathered}$

Alternate form:

u=76.48

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2 years ago