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Lena [83]
3 years ago
6

Tony’s class needs more than $500 for the school dance. So far, they have raised $200. They plan to have a car wash, charging $8

a car, to raise more money. Tony solved the inequality 8x + 200 Greater-than-or-equal-to 500, and determined that if they wash 37 cars, they will have enough money. Is he correct? Explain
Mathematics
2 answers:
liubo4ka [24]3 years ago
7 0
No, because if they washed 37 cars the equation would be 8•37+200. This equation equals 496. So they would only have 496 dollars therefore they would have to wash at least one more car.
nalin [4]3 years ago
6 0

Answer:

No, he is going to have $496, which is $4 dollars less than what he wanted.

Step-by-step explanation:

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-k -(7k-6n) +3n; k= -2 and n= -3<br><br> I need help solving this. Someone help me
maw [93]

Answer:

-11

Step-by-step explanation:

Firstly simplify your expression...by dealing with the brackets

; -k - 7k + 6n + 3n

;then substitute with the given values into your expression,

;-(-2) -7(-2) + 6(-3) + 3(-3)

; 2 + 14 - 18 - 9

; 16 - 27

;Hence the answer is -11

;

3 0
3 years ago
A chemical reaction took 7380 seconds. How many did the reaction take? If necessary, round your answer to the nearest hundredth
Radda [10]
<em>It took about 2.05 hours!
its already round to the nearest hundredths of an hour
 </em>
6 0
3 years ago
Read 2 more answers
What is the equation of a line that passes through the point (8, 1) and is perpendicular to the line whose equation is y=−23x+5
elena-s [515]

Answer:

y-1=\frac{1}{23} (x-8)

Step-by-step explanation:

We can write the equation of a line in 3 different forms including slope intercept, point-slope, and standard depending on the information we have. We have a point (8,1) and a slope from the equation y=-23x+5. We will chose point-slope since we have a point and slope.

Point slope:y-y_1=m(x-x_1)

m\neq -23 in our new equation because it us perpendicular to it. This means we will need to change it into its negative reciprocal which is m=\frac{1}{23}.

We will substitute m=\frac{1}{23} and x_1=8\\y_1=1.

y-1=\frac{1}{23} (x-8).

This is the equation of the line perpendicular to y=-23x+5 that crosses through (8,1).



5 0
3 years ago
Susan was posting gifts to her family. She weighed three envelopes before posting them. Geace Envelope A Envelope B Envelope C •
Blababa [14]

Answer:

5x+50

Step-by-step explanation:

you have one x. An x plus fifty. And 3 mire x's. So 5 x's and a 50.

8 0
3 years ago
Is -2z+10+7z=16z+7 a solution
STatiana [176]

Answer:

z=3/11

Step-by-step explanation:

<h3>I hope it helps you</h3>

<h3>-2z+10+7z=16z+7</h3><h3>-2z+10+7z-16z-7=0</h3><h3>-11z=-3</h3><h3>z=3/11</h3>

<h3>*-2z+10+7z=16z+7 it is not a solution.This is called equation.</h3>
8 0
3 years ago
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