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olasank [31]
3 years ago
14

Add, subtract, multiply, or divide. Can someone help me please.​

Mathematics
2 answers:
777dan777 [17]3 years ago
5 0
Number 7 is subtract
Varvara68 [4.7K]3 years ago
4 0

<u><em>7</em></u>:  8+(-4)=-2

<u><em>8</em></u>:  -7+2=-5

<u><em>9</em></u>:  -11-7=-18

<u><em>10</em></u>:  12÷(-6)=-2

<u><em>11</em></u>:   -9×(-3)=27

<em><u>12</u></em>:  4-(-3)=7

<em><u>13</u></em>:  -45÷9=-5

<u><em>14</em></u>:   6×(-3)=-18

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The value of a boat is $23,400. It loses 8% of its value every year. Find the approximate monthly percent decrease in value. Rou
Oduvanchick [21]
23400 x 8/100 = 1872 = the loss
1872 : 12 = 156= the loss each month
156/1872*100% = 8,33 % then round it
8 0
3 years ago
I need serious help with this! I'll give 20 points!
GrogVix [38]

Answer:

glizzy

Step-by-step explanation:

7 0
3 years ago
A sports stadium has 10000 seats, divided into box seats, lower-deck seats, and upper-devk seats. Box seats sell for 10 dollars,
lesantik [10]

Answer:

Number of box seats = 1000

Number of lower deck seats = 5000

Number of upper deck seats = 4000

Step-by-step explanation:

Let number of box seats = x

Let number of lower deck seats = y

Let number of upper deck seats = z

As per question statement:

x+y+z=10000 ...... (1)

Cost for box seat = $10

Cost for x box seats = 10x

Cost for lower deck seat = $8

Cost for y lower deck seats = 8y

Cost for lower deck seat = $5

Cost for z lower deck seats = 5z

As per question statement:

10x+8y+5z=70000 ..... (2)

z = 4x ..... (3)

Putting value of y in (1) and (2):

x+y+4x=10000\\\Rightarrow 5x+y=10000 ....... (4)

10x+8 y+5\times 4x=70000\\\Rightarrow 30x+8y=70000 ..... (5)

8 \times (4) - (5):

10x =10000

\Rightarrow x = 1000

By (3):

z = 4000

Now, by equation (1):

y = 5000

Number of box seats = 1000

Number of lower deck seats = 5000

Number of upper deck seats = 4000

6 0
3 years ago
Find the surface area of this triangular prism.<br> 3 cm<br> 5 cm<br> 11 cm<br> 4 cm
blondinia [14]

Step-by-step explanation:

The area of a triangular pyramid is 5 cm.

5 0
3 years ago
The mathematics department of a college has 7 male​ professors, 6 female​ professors, 12 male teaching​ assistants, and 7 female
Natalka [10]

Answer:

0.78125 or 78.125%

Step-by-step explanation:

Male professors = 7

Female professors = 6

Male T.A. = 12

Female T.A. = 7

Number of people in the department = 32

The probability that the selected person is a professor or a male is given by the probability that the person is a professor added to the probability that the person is a male, minus the probability that the person is a male professor:

P( P\ or\ M) = P(P) +P(M) - P(P\ and\ M)\\P( P\ or\ M) =\frac{7+6}{32}+ \frac{7+12}{32}- \frac{7}{32} \\P( P\ or\ M) = 0.78125 = 78.125\%

The probability is 0.78125 or 78.125%

6 0
3 years ago
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