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notsponge [240]
4 years ago
10

A student solved the equation 2x+2=10 using algebra tiles. She incorrectly says the solution is 6 . Solve the equation. What mis

take might the student have​ made?

Mathematics
2 answers:
Alex_Xolod [135]4 years ago
7 0

Answer:

she added 2 instead of subtracting it. the answer is x=4

Step-by-step explanation:

10+2=12

12/2=6

enot [183]4 years ago
3 0

Answer:

Step-by-step explanation:

2x+2=10 subtract 2 from each side

2x=8 divide each side by 2

x=4 is the correct solution.

Her error was most likely subtracting 2 from the left and adding 2 to the right

2x+2=10

2x=12

x=6

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Identify the solutions to the quadratic equation.
faltersainse [42]

Answer:

A and E

Step-by-step explanation:

x²+3x-28=0

x²+7x-4x-28=0

x(x+7)-4(x+7)=0

(x-4)(x+7)=0

x=4, x= -7

Please give brainliest if it helps

3 0
3 years ago
Mr. and Mrs. Smith retired on 80 percent of their pre-retirement earnings. If they are living on $35,000 per year, what was thei
hjlf
Below are the choices that can be found elsewhere:

a. 28,000
b. 43,750
c. 63,000
<span>d. 78,750
</span>
If they are living on $35,000 per year, the their pre-retirement income is <span>43,750. Its B. 

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7 0
4 years ago
A train leaves in Zurich at 22 40 and arrives in Vienna 07 32 the next day Work out the Time train takes
myrzilka [38]

Answer:

The train takes 8 hours and 52 minutes.

Step-by-step explanation:

Both Zurich and Vienna are in the same time zone, so there is no time to adjust the time zone.

Leaves: 22:40

Arrives: 7:32

From 23 to 7:32 there are (7 - 0) + (24 - 23) = 8 hours.

32 + (60 - 40) = 32 + 20 = 52 minutes.

The train takes 8 hours and 52 minutes.

7 0
3 years ago
I Need The Answer Please Help!!
mariarad [96]

Answer:

33°

Step-by-step explanation:

The sum of the 3 angles in a triangle = 180°

Subtract the sum of the 2 given angles from 180 for ∠1, that is

∠1 = 180° - (116 + 31)° = 180° - 147° = 33°

5 0
3 years ago
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Gennadij [26K]

Answer:

you alrady got the answer

Step-by-step explanation:

6 0
3 years ago
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