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natita [175]
3 years ago
9

4+8-1-9

- 9" align="absmiddle" class="latex-formula">
​
Mathematics
1 answer:
Vladimir [108]3 years ago
7 0
It’s 2 because 4+8 is 12 -1 is 11 -9 is 2
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Evaluate the expression (ab)2 for a = 4 and b = 3. A. 36 B. 24 C. 81 D.144
skelet666 [1.2K]

Answer:

Option D = 144

Step-by-step explanation:

First, you are not putting the expression correctly. I'm assuming you are mean to say (ab)². This is because if you want to multiply by 2, the 2 usually goes first like this 2ab. But it's not case, so, it should be as I said.

Now, let's replace the values for a and b into the expression:

(ab)² = (4 * 3)² = (12)² = (12*12) = 144

That's is why is option D.

4 0
3 years ago
You bought a video game for $35. You got it on sale
never [62]

Answer:

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Step-by-step explanation:

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3 years ago
Draw two lines that are perpendicular. What type of angle is formed where the perpendicular lines intersect?
Vladimir79 [104]

a right angle (90 degrees)

4 0
3 years ago
Read 2 more answers
Jack's last six scores are 75,78,83,80,79,84. If he scores a 90 on the next test, by how much will his mean test score increase?
kondaur [170]

Answer:

1.46

Step-by-step explanation:

First find the the mean score before he made a 90.

\frac{75+78+83+80+79+84}{6} = 79.83

Now add the score of 90 and calculate.

\frac{75+78+83+80+79+84+ 90}{7} = 81.29

Subtract the two scores.

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His mean test score increased by 1.46.

8 0
3 years ago
Marcos purchased a sail boat for $56,900. He anticipates each year the boat will decrease in value by 8.1% from the previous yea
Varvara68 [4.7K]

Answer: 56,900\left( 0.919\right)^x

Step-by-step explanation:

Given

Marcos purchased a sailboat for \$56,900

Each year the boat will decrease in value by 8.1\%

After 1 year it is

\Rightarrow 56,900-56,900\times 0.081\\\Rightarrow 56,900\left( 1-0.081\right)\\

after another year it becomes

\Rightarrow 56,900\left( 1-0.081\right)-56,900\left( 1-0.081\right)\times 0.081\\\Rightarrow 56,900\left( 1-0.081\right)\cdot \left( 1-0.081\right)\\\Rightarrow 56,900\left( 1-0.081\right)^2

After x years it is

\Rightarrow 56,900\left( 1-0.081\right)^x

\Rightarrow 56,900\left( 0.919\right)^x

5 0
2 years ago
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