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Lisa [10]
3 years ago
15

I WILL GIVE BRAINLIEST

Mathematics
1 answer:
krek1111 [17]3 years ago
8 0

Answer: +42x

Step-by-step explanation:

The student only multiplied each term individually.

He should have (7x+3)² = (7x+3)(7x+3)

Which is 49x²+42x+9

Therefore the error is (42x) or the failure to apply the law of multiplication of variables in a bracket.

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The total area of Russian is about 20,000,000
maksim [4K]

Answer: 19,990,000 times

Step-by-step explanation: Land area of Russia = 20000000

Land area of Puerto Rico = 10000

20000000 -  10000 = 19,990,000

7 0
2 years ago
Pls answer this question for ill give brainliest
notka56 [123]

Answer:

BE=15

Step-by-step explanation:

Since E is the center, BE=2x+1

And AC is 6x-12 with E being a midpoint.

Since AC is 2 segments and BE is only 1 then you multiply 2x+1 by 2 so that

you can find x. You multiply 2x+12 by 2 because E is the midpoint so that means ED is the same value as BE

6x-12=4x+2

BD=AC

6x-4x-12=2

2x=2+12

2x=14

x=7

BE= 2x+1

2(7)=14+1=15

7 0
2 years ago
¿Cuál es el peso total en kilos de los dulces?<br>A<br>2<br>3<br>B<br>oln​
Doss [256]

pesan 3kilos.

3/1=0.3kilos

4 0
2 years ago
I need help on this question
MA_775_DIABLO [31]

Answer:

1313.19 in

Step-by-step explanation:

have a nice dayyy :)

7 0
3 years ago
HELP :Write the expression as the<br> sine or cosine of an angle.
Reptile [31]

Answer:

sin(4π/21)

Step-by-step explanation:

Step 1: Rearrange expression

sin(π/3)cos(π/7) - cos(π/3)sin(π/7)

Step 2: Use sin(A ± B)

sin(π/3 - π/7)

Step 3: Evaluate

sin(4π/21)

And we have our answer!

5 0
3 years ago
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