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OlgaM077 [116]
3 years ago
6

A sprinter can run 279 feet in 9 seconds. find the sprinter's unit rate of feet per second.

Mathematics
2 answers:
kolezko [41]3 years ago
7 0

Answer:  The required sprinter's unit rate is 31 feet per second.

Step-by-step explanation:  Given that a sprinter can run 279 feet in 9 seconds.

We are to find the sprinter's unit rate of feet per second.

We will be using the UNITARY method to solve the given problem.

According to the given information, we have

In 9 second, distance run by the sprinter = 279 feet.

Therefore, in 1 second, the distance run by sprinter will be

\dfrac{279}{9}=31~\textup{feet per second}.

Thus, the required sprinter's unit rate is 31 feet per second.

MariettaO [177]3 years ago
3 0
279ft/9sec = xft/1sec
Cross multiply to get
9x = 279 divide by 9
x = 31
31 feet per second
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professor190 [17]
According to my calculations the 30% of 570 is 171

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Simplify the expression (3 - 4i)(1 + 5i) - (2 - i). Show your work please! I have the answer: 21 + `12i but I need to show my wo
masha68 [24]

Answer:

21+12i i hope this will help you

Step-by-step explanation:

(3-4i)(1+5i)-(2-i)

=[3(1+5i)-4i(1+5i)]-(2-i)

=[3+15i-4i-20i²]-(2-i)

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8 0
3 years ago
Iris tenía cierta cantidad de dinero por su cumpleaños su mamá le dio 20 soles después tu papá le dio el triple de lo que ya ten
Alisiya [41]

Resultado:

{ \:  \:  \:  \:  \:  \:  \:  \:  \:  \Rightarrow 20 + 60 + 80 = 160}

\:  \:  \:  \:  \:  \:  \:  \:  \: \sf \Rightarrow20+60+80=160

\:  \:  \: \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \: { \sf \Rightarrow160 - 100 = 60}

\:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \sf \Rightarrow160−100=60

\:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \: { \sf \Rightarrow100 - 60 = 40}

\:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \: { \sf \Rightarrow100−60=40}

\:  \:  \:  \:  \:  \:  \sf \Rightarrow60 + 40 + 100 = 200

\:  \:  \: \:  \:  \:  \: { \sf  \Rightarrow60+40+100=200}

\bf\green{\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\: Answer :}

Iris al principio tenía 40 soles.

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