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1 year ago

10

Derek bought 6.00 worth of 21 cent stamps and 41 cent stamps.

1 answer:

sattari [20]1 year ago

6 0

we have the expression

$0.21s+0.41(s-2)=6.00$

Solve for s

that means ----> isolate the variable s

$0.21s+0.41s-0.82=6.00$

Combine like terms

$\begin{gathered} 0.62s=6.00+0.82 \\ 0.62s=6.82 \end{gathered}$

Divide by 0.62 both sides

$\begin{gathered} s=\frac{6.82}{0.62} \\ s=11 \end{gathered}$

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F(2)=7 into coordinate points

Lisa [10]

I don’t know how to do this type stuff so sorry hope someone els can help u tho

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2 years ago

A rectangle with a perimeter of 19m^2+2m-10 and a width of m^2 write an expression for the lenght

expeople1 [14]

Answer:

$8.5m^{2}+ m -5$

Step-by-step explanation:

Since perimeter, $P=19m^{2}+ 2m -10$ and we know that P=2(l+w) then $P=2(l+m^{2})=2l+2m^{2}$

The length will be $2l=19m^{2}+ 2m -10-2m^{2}=17m^{2}+ 2m -10$

Now $l=8.5m^{2}+ m -5$

6 0

2 years ago

(-5) -2-8 + 1<br>1-5-2-8<br>helpp plisssssss

Hoochie [10]

Answer:

-14

Step-by-step explanation:

(-5)-2-8+1

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5 0

3 years ago

Read 2 more answers

A ball is thrown into the air. The height in feet of the ball can be modeled by the equation h = -16t2 + 20t + 6 where t is the

makkiz [27]

$f(t)=h=-16t^2+20t+6

$

a=-16, b=20, c =6

Δ= $b^2-4ac=20^2-4*(-16)*6=400+384=784$

$\sqrt{Δ}=\sqrt{784}=28$

max:

$p=-\frac{b}{2a}=-\frac{20}{-32}=\frac{20}{32}=\frac{5}{8}$

max heigh: $h=-16(\frac{5}{8})^2+20*\frac{5}{8}+6=-16\frac{25}{64}+\frac{100}{8}+6$

$h=-\frac{25}{4}+\frac{50}{4}+6=\frac{-25+50+24}{4}=\frac{49}{4}$

$h=\frac{49}{4}$ at $t=\frac{5}{8}s$

will fall down at t:

$t=\frac{-20-28}{-32}=\frac{-48}{-32}=\frac{3}{2}=1.5$

$t=1.5s$

8 0

2 years ago

51 is 17% of what number

Juliette [100K]

Answer is 300
first change the 17% to decimal value, which is 0.17
Put everything in equation: 51=0.17x
then solve for it
51=0.17x
x=51/0.17
x=300
the number is 300

3 0

3 years ago