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hichkok12 [17]
3 years ago
15

Which expression is equivalent to 5(8 + 9)?

Mathematics
2 answers:
Blababa [14]3 years ago
6 0
The answer is 40 + 45
77julia77 [94]3 years ago
4 0
This is the answer: 40+45
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Please help i’m confused
Pavel [41]

Answer:

The answer is A. t = 0.4n

Step-by-step explanation:

<em>See how on the graph, when n is 2, t is around 1? We just plug in 2 into n into the equation, t=0.4n. 0.4 times 2 is 0.8, so t=0.8. 0.8 is around 1, so a is right.</em><em> </em>If we tried the same thing with one of the other choices, like B. t=2.5n, then plugging in 2 into n would give us 2 times 2.5, which is 5. 5 is nowhere around 1, making it wrong.

6 0
2 years ago
Y is directly proportional to square root of x<br> If y=56 when x=49 find,<br> y when x=81
STALIN [3.7K]

\qquad \qquad \textit{direct proportional variation} \\\\ \textit{\underline{y} varies directly with \underline{x}}\qquad \qquad \stackrel{\textit{constant of variation}}{y=\stackrel{\downarrow }{k}x~\hfill } \\\\ \textit{\underline{x} varies directly with }\underline{z^5}\qquad \qquad \stackrel{\textit{constant of variation}}{x=\stackrel{\downarrow }{k}z^5~\hfill } \\\\[-0.35em] \rule{34em}{0.25pt}

\stackrel{\begin{array}{llll} \textit{"y" directly}\\ \textit{proportional to }\sqrt{x} \end{array}}{y = k\sqrt{x}}\qquad \textit{we know that} \begin{cases} y = 56\\ x = 49 \end{cases}\implies 56=k\sqrt{49} \\\\\\ 56=7k\implies \cfrac{56}{7}=k\implies 8=k~\hfill \boxed{y=8\sqrt{x}} \\\\\\ \textit{when x = 81, what is "y"?}\hfill y=8\sqrt{81}\implies y=8(9)\implies y=72

7 0
2 years ago
Send answer really need it
Travka [436]

Answer:

DO U KNOW HOW TO GET MORE POINTS?

Step-by-step explanation:

7 0
2 years ago
Read 2 more answers
A cruise ship can cover 19 nautical miles in 323 minutes. How many nautical miles will it travel in 102 miles?
kow [346]
1 mile is equal to 0.868976 nautical miles
Therefore 12 miles is equal to 10.427, rounded the answer is B. 

Hope that was helpful.
4 0
3 years ago
Help me please !!! ASAP
jok3333 [9.3K]
When multiplying numbers a negative number will make a positive into a negative. Yet if multiplied again by another negative it will cancel out or make it positive again. Seeing as answer c has only one negative it's the correct answer.
4 0
3 years ago
Read 2 more answers
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