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Alja [10]
3 years ago
5

I need help ASAP due in an hour only the highlighted ones plz:)​

Mathematics
1 answer:
kolbaska11 [484]3 years ago
7 0

Answer:

15.

a) 9

b) (x + 3)(x + 3) or (x + 3) ^ 2

16.

a) 121

b) (x + 11)(x + 11) or (x + 11) ^ 2

17.

a) 81

b) (x + 9)(x + 9) or (x + 9) ^ 2

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How many solutions do these equations have y= 3x+4 y+6=3x
Nataly [62]

Answer:

Step-by-step explanation:

hello :

the system is :  y= 3x+4....(*)

                         y+6=3x....(**)

by (**) : y = 3x - 6

so : y= 3x+4

      y= 3x - 6

means :  3x+4 = 3x - 6

                     4= -6.......(false)

conclusion : no reals  solutions

5 0
3 years ago
A combined total of $46,000 is invested in two bonds that pay 4% and
valkas [14]


Answer: 4%-16000 and 9.5%-30000

Why:

1) x+y=46000

x=46000-y

2) 4%x+9,5%y=3490;

4x + 9.5y=349000; so 4*(46000-y)+9.5y=349000;

5.5y=165000

y=30000

x=46000-30000=16000


5 0
3 years ago
Brooke's bedroom has an area of 36 square feet. The bedroom is 6 times as many square feet as Brooke's closet. If the closet is
denis23 [38]

Answer:

195

Step-by-step explanation:

Because 36 x 6 = 192 + 3 = 195

6 0
3 years ago
A is the point (2, 3) and B is the point (7,-5).Find the equation of the line
madam [21]

Step-by-step explanation:

Find the gradient of AB

-2.5

Find the gradient of perpendicular

0.4

Make the equation

y= 0.4x + c

Apply point A

3= 0.4*2+c

3-0.8= c

c= 2.2

y= 0.8x + 2.2

5 0
2 years ago
Read 2 more answers
A person's resting heart rate is typically between 60 and 100 beats per minute. Noah looks at his watch, and counts 8 heartbeats
Pavlova-9 [17]

Answer:

No, his heartbeat is 48 beats per minute (12 beats below the minimum beats per minute of a typical person's heartbeat (60 beats)).

Step-by-step explanation:

Every 10 seconds, Noah's heart beats 8 times.

Therefore, every 1 minute, his heart beats 48 times.

Noah's heartbeat is below a typical person's resting heart rate.

4 0
3 years ago
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