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NNADVOKAT [17]
2 years ago
6

Solve x^2 – 2x – 15 = 0 using the zero product property.

Mathematics
1 answer:
lawyer [7]2 years ago
8 0
You could just factor out the Trinomial and find the zeros of the equation,

x^2 - 2x -15 = (x - 5)(x + 3) = 0,

x - 5 = 0 and x + 3 = 0, so x = 5,-3 AKA answer choice C
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Alexis uses toy blocks to build a model of a building each toy block is 1 cubic inch The first three floors of the model are Mad
Alenkinab [10]

Answer: The volume is 40 cubic inches

Step-by-step explanation: Each toy block is 1 cubic inch, which means each toy block is a cube with all sides (Length, width and height) measuring 1 inch. That makes the volume of each cube or block to be derived as;

Volume = L x W x H

Volume = 1 x 1 x 1

Volume = 1 cubic inch

The first 3 floors are made up of six rows of four blocks. This means, the first 3 floors has six by four blocks, that is, six times four blocks and that gives us 24 blocks.

The fourth to eighth floors are made up of four rows of four blocks. This also means four by four blocks, that is, four times four blocks and that gives us 16 blocks.

Having determined the amount of blocks used in the total model building as

1st - 3rd = 24 blocks

4th - 8th = 16 blocks

The total number of blocks used is 24 plus 16 which equals 40. Having been told that each block has a volume of 1 cubic inch, the volume of the model building equals 40 cubic inches.

8 0
2 years ago
What is another way to write the equation 7/8 x+ 3/4 = -6
Dmitry_Shevchenko [17]

Answer:

  1) 7(x/8) + 3/4 = -6

Step-by-step explanation:

The term (7/8)x can be written as 7(x/8).

_____

The associative and commutative properties of multiplication let you put the factors (7)(1/8)(x) in any order or grouping you like.

Here, instead of (7·1/8)·x, the question is offering the rewrite 7(1/8·x), a straightforward application of the associative property.

7 0
3 years ago
Need help please very confuzzled
SVEN [57.7K]
I'm not too sure either.

5(5) + 3(5) = 40 and

5(2) + 3 (10) = 40

If you can't think of anything maybe that'll help
7 0
3 years ago
Read 2 more answers
Duncan takes a break from studying and goes to the gym to swim laps. If swimming burns 9.05×105 cal per hour, how many kilojoule
fgiga [73]

For this case we have to by definition:

1 kilojoule equals 0.239006 kilocalorie.

1 kilocalorie equals 1000 calories

Then, if we have:9.05 * 10 ^ 5 \frac {calories} {hour} *\frac {1} {1000} \frac {kilocaloria} {calorie} = 9.05 * 10 ^ 2 \frac {kilocaloria} {hour}

Now:

9.05 * 10 ^ 2 \frac {kilocaloria} {hour} * \frac {1} {0.239006} \frac {kilojoule} {kilocaloria} = 3786.52 \frac {kilojoule} {hour}

Answer:

3786.52 \frac {kilojoule} {hour}

3 0
2 years ago
multiplication is defined as repeated addition.use the word repeated to define exponential form.justify your reasoning.
mash [69]
Exponential form is when a certain number is raised to the power of a certain number or also known as exponents. Exponents signifies that the base or the number that is being raised to a certain powers will be multiplied a number of times, based on the exponents).

Exponential form is defined as repeated multiplication of  the base.
4 0
3 years ago
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