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katovenus [111]
3 years ago
12

Evaluate the expression for x =5 and y= 1 (x-7y)² pretty confused

Mathematics
2 answers:
Ghella [55]3 years ago
7 0

Answer:

49y^2+y-25=0

Step-by-step explanation:

(5_7y)^2=25-49y^2

y=25-49y^2=49y^2+y-25=0

sveticcg [70]3 years ago
5 0

Answer:

-4

Step-by-step explanation:

So since x=5 and y= 1 the new expression would be 1(5-7) to the second power. Using pemdas, 5-7 is -2. -2 to the second power is -4. negative 4 times 1 is negative 4.

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Number 9 need help!!!
Nadya [2.5K]
So if the driveway is 45 feet long and he clears 6 feet per hour, we can divide 45 by 6 to find out how many hours it will take for him to clear the driveway and that is essential

45 / 6 = 7.5
45 feet / 6 feet per hour = 7.5 hours to clear the driveway
So now we know that the graph will end when he clears the driveway
If we know he will finish after 7.5 hours then find the graph that ends at the 7.5 hour mark,  and that is the last one

3 0
3 years ago
Solve for x. 2/3(3x−4)+3x=5/6
BartSMP [9]

Answer:

2/3 ( 3x - 4 ) + 3x = 5/6

2x - 8/3 + 3x = 5/6

5x - 8/3 = 5/6

6(5x -8/3) = 6x5/6

30x - 16 = 5

<u>       +16    +16</u>

<u>30x = 21</u>

   30

x = 21/30

x = 0.7

Step-by-step explanation:

  1. distribute the bracket by 2/3
  2. combine like-terms
  3. multiply both sides by 6 (lcm of 3 and 6)
  4. add 16 to both sides
  5. divide both sides by 30 to get x
3 0
3 years ago
16. What is the measure of ZAOB?
skelet666 [1.2K]
Find angle a2 which is 40 degrees because it is parallel to angle c.

Find the total of d1 and d2.
total of d1 and d2: 180 - 40 - 40 = 100 degrees

Find d1 and d2 separately.
100 divided by 2 = 50 degrees

Use d1 to find b1 to find total of a1 and a2.

b1 is parallel to d1 so b1 = 50 degrees

a1 and a2 = 180 - 50 - 50 = 80 degrees

a1 = 80 divided by 2 = 40

Since a1 and c1 are parallel due to alternate angles, c1 is 40 degrees

Find b2 now which requires you to do total - minus all angles in the triangle with angle b2.

180 - 40 - 50 - 40 = 50 degrees (angle b2)

AOB has b1 and a1.

40 + 50 = 90 degrees (a1 + b1 = AOB)

The answer is 90 degrees
7 0
3 years ago
The elephants at the zoo eat 5/6 of a bucket of bananas each day. The zookeeper bought 2 1/2 buckets of bananas. How many days w
Aleks [24]

Answer:

3 days

Step-by-step explanation:

We know that there is 5/2 buckets of bananas, and each day 5/6 is eaten, so the answer is 5/2 divided by 5/6 which is 3

7 0
3 years ago
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A diver begins at 150 feet below sea level, descends at a steady rate of 5 feet per minute for 3.5 minutes, and then ascends 122
marusya05 [52]
Start at -150, then add 3(-5), then add 122.2. -150 + 3(-5) + 122.2 = -45.3
3 0
4 years ago
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