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3 years ago

Solve each equation. Check your solution. 7a+10=2a

Mathematics

1 answer:

Debora [2.8K]3 years ago

5 0

Answer:

a = -2

Step-by-step explanation:

7a + 10 = 2a

subtract 7a from each side

7a-7a+10 = 2a-7a

10 = -5a

divide by -5

10/-5 = -5a/-5

-2 = a

check

7 (-2) +10 = 2(-2)

-14 + 10 = -4

-4 = -4

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Answer:

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Step-by-step explanation:

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2 years ago

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3 years ago

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2 years ago

Help me answer this question.

neonofarm [45]

Answer:

<h2>8 units²</h2>

Step-by-step explanation:

Let side of the square = a

The , Area of square = a²

Now, Midpoint of Diagonal DB is E

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So, DB = 2 DE = 2 × 2 = 4 units

Now, using Pythagoras theorem in ∆ BCD

DB² = DC² + BC²

plug the values

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Collect like terms

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Divide both sides of the equation by 2

$\frac{2 {a}^{2} }{ 2 } = \frac{16}{2}$

Calculate

${a}^{2} = 8$

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Hope this helps..

Best regards!!

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Step-by-step explanation:

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2 years ago

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