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2 years ago

Please help __________________

Mathematics

2 answers:

pogonyaev2 years ago

7 0

Answer:

She will spend 2.66 dollars

Step-by-step explanation:

ryzh [129]2 years ago

7 0

Answer:

she would spend $7.52

Step-by-step explanation:

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A train travels 40 miles and 65 minutes to the nearest tenth of a mile how far does the train travel per minute

erik [133]

Answer:1.625

Step-by-step explanation:you just divide 65 and 40

8 0

2 years ago

The product of (3 − 4i) and____is 25.

LiRa [457]

$(3-4i)(a+bi)=25\qquad\text{use FOIL method}\\\\(3)(a)+(3bi)+(-4i)(a)+(-4i)(bi)=25+0i\\\\3a+3bi-4ai-4bi^2=25+0i\\\\3a+3bi-4ai-4b(-1)=25+0i\\\\3a+3bi-4ai+4b=25+0i\\\\(3a+4b)+(3b-4a)i=25+0i\\.\qquad\qquad\qquad\qquad\Downarrow\\\\3a+4b=25\ and\ 3b-4a=0\\\\3b-4a=0\qquad\text{add 4a to both sides}\\\\3b=4a\qquad\text{divide both sides by 3}\\\\b=\dfrac{4}{3}a\qquad\text{substitute it to the first equation}\\\\3a+4\left(\dfrac{4}{3}a\right)=25\\\\3a+\dfrac{16}{3}a=25\qquad\text{multiply both sides by 3}$

$9a+16a=75\\\\25a=75\qquad\text{divide both sides by 25}\\\\\boxed{a=3}\qquad\text{put the value of a to}\ b=\dfrac{4}{3}a:\\\\b=\dfrac{4}{3}(3)\\\\\boxed{b=4}\\\\Answer:\ \boxed{(3-4i)\underline{(3+4i)}=25}$

6 0

2 years ago

At the Museum of Modern Art , 5 students share 4 subs.

Degger [83]

Answer:

1.25 of a sandwich

Step-by-step explanation:

5/4=1.25

I'm not sure if you have to round it or not, but I think this would be exact!

Hope this helps!

7 0

3 years ago

I need help? Does anyone know how to do this?! Will receive 40 POINTS!

FinnZ [79.3K]

I am not for sure that what im about to type is the right answer but if im not wrong the amswer is 1over4

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3 years ago

Angle B measures 60° What is the measure of the angle that is complem<br>30<br>60<br>120<br>180

Liula [17]

Angle B = 60°

The complement of angle B is 90 - x.

60° + (90 - x)° = 180°

Can you take it from here?

6 0

2 years ago

Read 2 more answers

Please help __________________​

Please help __________________