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Ganezh [65]
3 years ago
12

PLS HELP

Mathematics
2 answers:
mihalych1998 [28]3 years ago
6 0
A. 80 miles

B. 20 hours
I am Lyosha [343]3 years ago
6 0
80 and 20 i think sorry
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Enny White is shopping for CDs. She decides to purchase 3 movie soundtracks. The music store has 7 different movie soundtracks i
zubka84 [21]

Answer:

35\ ways

Step-by-step explanation:

we know that

<u><em>Combinations</em></u> are a way to calculate the total outcomes of an event where order of the outcomes does not matter.

To calculate combinations, we will use the formula

C(n,r)=\frac{n!}{r!(n-r)!}

where

n represents the total number of items

r represents the number of items being chosen at a time.

In this problem

n=7\\r=3

substitute

C(7,3)=\frac{7!}{3!(7-3)!}\\\\C(7,3)=\frac{7!}{3!(4)!}

simplify

C(7,3)=\frac{(7)(6)(5)4!}{3!(4)!}

C(7,3)=\frac{(7)(6)(5)}{3!}

C(7,3)=\frac{(7)(6)(5)}{(3)(2)(1)}

C(7,3)=35\ ways

6 0
3 years ago
A hot air balloon is cruising at an altitude of 120 meters above the ground when it begins its descent. The balloon descends at
Gekata [30.6K]

Answer:

120 - 4.5t= 75

t = 10 minutes

Step-by-step explanation:

the equation :

120 - 4.5t= 75

the solution:

-4.5 t = 75-120

-4.5t = -45

t = -45/(-4.5) = 10 minutes

4 0
2 years ago
Which shows how to best estimate the product of 4.73 x 8.92?
Anettt [7]

Answer:

5 x 9 = 45

Step-by-step explanation:

A good way to estimate this would be rounding to the nearest whole number.

First we'll look at 4.73. If we're rounding to the nearest whole number, then that means we'll look at the digit one place to the right of 4. The digit to the right of 4 is 7. 7 is greater than 5 so we round up. We get 5. If we do the same for the other number we see that it also gets rounded up to 9. So our new equation is: 5 x 9. That is a simple multiplication equation and when we multiply we get 45.

Hope this helped!

6 0
3 years ago
Read 2 more answers
If you add 3 groups of 10 to 100, what is the total? How do you know?
Mazyrski [523]

Answer:

130

Step-by-step explanation:

3*10 =30+100=130

4 0
3 years ago
Read 2 more answers
Do you know SpongeBob? According to a survey by Nickelodeon TV, 88% of children under 13 in Germany recognized a picture of the
solmaris [256]

Answer:

22/25

Step-by-step explanation:

Well, you just convert the 88% into a fraction as probability is in fractions so 88% = 22/25

5 0
2 years ago
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