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kap26 [50]
3 years ago
8

Place decimal points in 34, 4, and 417 so that the sum of the three numbers is 7.97.

Mathematics
1 answer:
KIM [24]3 years ago
8 0
3.4+0.4+4.17=7.97 you just have to try different combinations of different numbers with the decimals.
                                                             





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(2+0.4 + 0.6)² I have been stuck on this problem for a while
Anna11 [10]
\begin{gathered} \Rightarrow(2+0.4+0.6)^2 \\ \Rightarrow(2+1)^2 \\ \Rightarrow3^2 \\ \Rightarrow9 \end{gathered}

7 0
1 year ago
A customer works into a post office to purchase stamps. she purchases a total of 45 stamps. some of the stamps are 49cent stamps
baherus [9]

Step-by-step explanation:Let number of 49 cents =A

                                             Let number of 33 cents=B

<u>A+B=45    equation 1</u>

1 $=100 cents

49 cents =.49 dollar

33 cents=.33 dollar

so .<u>49A+.33B=17.89    equation 2</u>

Add equation 1 and equation 2

since these are simultaneous equations

.49A+.33B=17.89

     A+     B=45

so divide equation 2 by 100 we get

49A+33B=1789

    A+B     =45 multiply equation 1 by 33 on both the sides we get

<u>33A+33B=1485     equation 3</u>

so subtract equation 3 from equation 2 we get

49A+33B=1789  equation 2

<u>33A+33B=1485    equation 3</u>

<u>16A+0      =304</u>

16A=304

A=304/16

A=19

putting nalue of A in equation 1 we get

A+B=45

19+B=45

B=45-19

B=26

so number of 49 cent stamps are 19

and number of 33 cent stamps are 26

5 0
2 years ago
I need help!!! Can you figure this out?
Aneli [31]

Answer:

128 degrees

Step-by-step explanation:

38+90=128

5 0
2 years ago
Researchers wanted to see which species of lizard (A, B, or C) is most likely to survive a bacterial infection. So they infected
Slav-nsk [51]

Answer:

A) attached below

B) 0.61

C) 0.47

Step-by-step explanation:

Given data:

Total number of lizards infected = 38

Of the 15 species B lizards 40% survived

For specie C one more survived than died

Out of the 24 lizards that died 1/3 were species A

<u>A) contingency table </u>

attached below

<u>B) Determine the proportion of these lizards in this study that were either specie A or Specie B </u>

P ( A or B ) = ( 8 + 15 ) / 38 = 0.605 ≈ 0.61

<u>C) determine the probability that specie C lizard did not study </u>

P ( not surviving  | C ) = 7 / 15 = 0.466 ≈ 0.47

7 0
2 years ago
Assume that the following events are independent: • probability that a randomly selected person has red hair is 0.14 • probabili
erastovalidia [21]
I think the answer is C.
3 0
2 years ago
Read 2 more answers
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