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lidiya [134]
3 years ago
11

Which phrase represents 3y+9​

Mathematics
2 answers:
sweet [91]3 years ago
8 0

Answer:

9 more than 3 times y; first option

Step-by-step explanation:

3y is 3 times y, and +9 represents 9 more.

Alex3 years ago
4 0

Answer:

A. 9 more than 3 times y

Step-by-step explanation:

3 and y are next to each so it is multiplying then the 9 is being added after word. Therefore, 9 more than 3 times y. If it said 9+3y the answer would be the same since we have to follow the PEMDAS order. Parenthesis, exponents, multiplication and division, addition and subtraction.

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The number of bacteria on a piece of toast triples every
Illusion [34]

Answer:

You begin with 1 bacteria, and after 1 hour it has tripled so you now have 1 x 3=3.

Next hour, it triples again so you now have 1 x 3 x 3=9

You can see the pattern shows that the number of bacteria is multiplying every hour by a factor of 3. An exponent denotes how many times we are multiplying a number by itself, for example: 34 means we are multiplying the number 3 a total of 4 times (3 x 3 x 3 x 3).

Therefore the question is requiring us to triple the number of bacteria every hour for 24 hours, which means we are multiplying by 3 a total of 24 times. This gives us:

n x 324 where n is the number of bacteria you begin with.

Since you begin with 1 bacteria, the solution is 1 x 3 to the power 24 and u will get ur answer

6 0
3 years ago
Find the length of the third side. If necessary, write in simplest radical form.
soldier1979 [14.2K]

Answer:

the same way Pythagoras Theorem

and sorry for the hand writing

3 0
3 years ago
Sergey is solving 5x2 + 20% – 7 = 0. Which steps could he use to solve the quadratic equation by completing the
Mrac [35]

Answer:

5(x^2+4x)=7

5(x^2+4x+4)=7+20

(x+2)=\pm\sqrt{\frac{27}{5}}

Step-by-step explanation:

we have

5x^2+20x-7=0

step 1

Group terms that contain the same variable, and move the constant to the opposite side of the equation

5x^2+20x=7

step 2

Factor 5 left side

5(x^2+4x)=7

step 3

Complete the square

5(x^2+4x+2^2)=7+2^2(5)

5(x^2+4x+4)=7+20

5(x^2+4x+4)=27

step 4

Rewrite as perfect squares

5(x+2)^2=27

step 5

(x+2)^2=\frac{27}{5}

(x+2)=\pm\sqrt{\frac{27}{5}}

(x+2)=\pm\frac{3\sqrt{15}}{5}

step 6

x=-2\pm\frac{3\sqrt{15}}{5}

6 0
4 years ago
Read 2 more answers
Which expression is equivalent to 8
Marina CMI [18]

Step-by-step explanation:

-8 × -1

8 × 1

2 × 4

I hope this helps!

6 0
3 years ago
Find the geometric mean.<br> Please
slava [35]

Answer:

number one  2.7052932226

number two  2.0870584201

Step-by-step explanation:

multiply the 'n' values altogether and take out the nth root of the numbers, where n is the total number of values. For example: for a given set of two numbers such as 8 and 1, the geometric mean is equal to √(8×1) = √8 = 2√2.

3 0
2 years ago
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