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Len [333]
4 years ago
10

Answer this problems for me please

Mathematics
1 answer:
Alla [95]4 years ago
7 0
When multiplying terms with the same base with exponents, you keep the base and add the exponents.

2^4 * 2^3 = 2^7

Any number with an exponent of zero equal one.

4^0 = 1

Multiply exponents when the term is being multiplied by a power.

(2^4)^3 = 2^12

When dividing terms with exponents, you keep the base and subtract the exponents.

9^7/9^5 = 9^2 9^5/9^7 = 1/9^2


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Solve the following system of equations algebraically:<br> 4x - 5y = 18<br> 3x – 2y = 10
fiasKO [112]

Answer:

D

Step-by-step explanation:

Given the 2 equations

4x - 5y = 18 → (1)

3x - 2y = 10 → (2)

Multiplying (1) by 3 and (2) by - 4, then adding will eliminate the x- term

12x - 15y = 54 → (3)

- 12x + 8y = - 40 → (4)

Add (3) and (4) term by term to eliminate x, that is

- 7y = 14 ( divide both sides by - 7 )

y = - 2

Substitute y = - 2 into either of the 2 equations and solve for x

Substituting into (1)

4x - 5(- 2) = 18

4x + 10 = 18 ( subtract 10 from both sides )

4x = 8 ( divide both sides by 4 )

x = 2

solution is (2, - 2 ) → D

8 0
4 years ago
7 - 2.25 =<br><br>9- 1.9 = <br>answer both <br>10 Points and mark as brianliste​
Furkat [3]

Answer:

7 - 2.25

= 7 - 2

= 5 - 0.25

= 4.75

9 - 1.9

= 9 - 1

= 8 - 0.9

= 7.1

I hope this helps and that you have a great day!

<em />

<em>Ravenna</em>

5 0
3 years ago
Find Y.<br> Round to the nearest tenth.
Dennis_Churaev [7]

Answer:

Y ≈ 59.0°

Step-by-step explanation:

Using the Cosine rule

cosY = \frac{x^2+z^2-y^2}{2xz}

with x = 22, y = 20, z = 18

cosY = \frac{22^2+18^2-20^2}{2(22)(18)}

        = \frac{484+324-400}{792}

        = \frac{408}{792} , then

Y = cos^{-1} ( \frac{408}{792} ) ≈ 59.0° ( to the nearest tenth )

8 0
3 years ago
Diana got back her math quiz but Ms. Signer forgot to calculate her final grade. If the quiz had a total of 20 questions on it,
svet-max [94.6K]

Answer:

She made a final grade of 80% or you could say she got 20% of the questions wrong.

5 0
3 years ago
Which of these two kites we use more paper to make? Circle your answer?
motikmotik

Answer:

I believe both kites use the same amount of paper

Step-by-step explanation:

They both have equal measures but I'm not too sure

7 0
3 years ago
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