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3 years ago

I know the answer to number 7 but I just want to see if you guys know it

Mathematics

2 answers:

Nataly_w [17]3 years ago

6 0

1. 9(3)+3 = 27+3 = 30
2. 9( $8^{4}$ ) = 9(4096) = 36864
3. 9-6+3 = 6
4. 6(5)+30 = 30+30 = 60
5. 6( $8^{3}$ ) = 6(512) = 3072
6. ( $8^{3}$ )+84 = 512+84 = 596
7. 200+51 = 251
8. 3(18)+ $18^{2}$ = 54+324 = 378
9. 12(24)-36 = 288-36 = 252
10. 4(11+90)+10 = 44+280+10 = 334
11. 8-8 = 0
12.14(95)-1264+1 = 1330-1264+1 = 66+1 = 67

elixir [45]3 years ago

4 0

Plugging 10 for k in the expression gives us
$2(10)^2+5(10)+1$ We simplify this expression to $200+50+1=251$
251 is your answer

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Ella Buys a book and a pen for $14. The cost of the book is two dollars more than twice the cost of the pen. Write a system of l

Vilka [71]

Answer: The book costs $10 and the pen costs $4✔️

Step-by-step explanation:

Let B the cost of the book and let P the cost of the pen.

Then we know:

The book and the pen cost $14:

B + P = $14 } Equation 1

We also know:

The cost of the book is two dollars more than twice the cost of the pen.

B = 2P + $2 } Equation 2

Now we can substitute the value of B from the equation 2 in the equation 1:

2P + $2 + P = $14

3P = $14 - $2 = $12

P = $12/3 = $4 , cost of the pen

Since we know the value of B from the equation 2, we can calculate B:

B = 2P + $2 = 2x$4 + $2 = $8 + $2 = $10 , cost of the book

Answer: The book costs $10 and the pen costs $4✔️

<h3>Verify </h3>

We can substitute these values in equations 1 and 2 and check the results:

B + P = $14 } Equation 1

$10 + $4 = $14 ✔️check!

B = 2P + $2 } Equation 2

$10 = 2x$4 + $2 = $8 + $2 = $10 ✔️check!

<h2><em>Spymore</em></h2>

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3 years ago

Find the value of b here

sweet [91]

Answer:

Step-by-step explanation:

We will start with the angle that measures 57 degrees. This angle is supplementary to the one next to it coming off the straight line. 180 - 57 = 123.

The rule for quadrilaterals is that same side angles are supplementary, so the angle next to the 123-degree angle (to the immediate left of that angle 123) is 57. THAT 57-degree angle is supplementary to angle b, so angle b = 180 - 57 which is 123. So C is your answer.

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3 years ago

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Karo-lina-s [1.5K]

Answer:

Okay, so this is confusing because of the negitave. Is that supposed to be there?

Step-by-step explanation:

The answer is A.

We know this because the exponents are in the form 2*t.

The final form will be (1/2)^2t

So I am not sure where the negitave came form because in every number sentence I solved they had no negitave exponent. Hope this is useful.

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An angle of 2OO degree is an ?

Firdavs [7]

obtuse angle?

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Alex787 [66]

Answer:

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There is a class where Carol Sitea is enrolled.

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There are two students (that arn't the same person) that, for every class, if one is enrroled, the other is enrrolled too.

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3 years ago