Ask question

Ask question

All categories

3 years ago

9

During a math test, Eduardo finished 5 items

1 answer:

statuscvo [17]3 years ago

5 0

Answer:

45 minutes

Step-by-step explanation:

since 5 item--> 3 min

make a proportion

5/3=75/x

x=45

You might be interested in

Simplify using only POSITIVE exponents:

pickupchik [31]

So here are a few rules with exponents that you should know:

Multiplying exponents of the same base: $x^m*x^n=x^{m+n}$
Dividing exponents of the same base: $x^m\div x^n=x^{m-n}$
Powering a power to a power: $(x^m)^n=x^{m*n}$
Converting a negative exponent to a positive one: $x^{-m}=\frac{1}{x^m}\ \textsf{and}\ \frac{1}{x^{-m}}=x^m$

<h2>1.</h2>

Firstly, solve the outside exponent:

$(2x^3y^7)^{-2}=2^{-2}x^{3*-2}y^{7*-2}=2^{-2}x^{-6}y^{-14}$

Next, convert the negative exponents into positive ones:

$2^{-2}x^{-6}y^{-14}=\frac{1}{2^2x^6y^{14}}=\frac{1}{4x^6y^{14}}$

<u>Your final answer is $\frac{1}{4x^6y^{14}}$ </u>

<h2>2.</h2>

For this, just divide:

$\frac{12x^5y^3}{4x^{-1}}=\frac{12}{4}x^{5-(-1)}y^{3-0}=3x^6y^3$

<u>Your final answer is $3x^6y^3$ </u>

<h2>3.</h2>

For this, convert all negative exponents into positive ones:

$\frac{r^{-7}b^{-8}}{t^{-4}w}=\frac{t^4}{r^7b^8w}$

<u>Your final answer is $\frac{t^4}{r^7b^8w}$ </u>

3 0

3 years ago

Plzz help due in 2 mins

daser333 [38]

Answer:

19.84

the decimal has to stay in the same place

Step-by-step explanation:

5 0

3 years ago

Cerrena [4.2K]

Answer:

Step-by-step explanation:

5 0

3 years ago

-<br>nun<br>THE SUM OF THREE TIMES A<br>Numbers and 11

Vikentia [17]

Answer:

3x + 11

Step-by-step explanation:

Remember BPEMDAS.

"Three times a number" is saying multiply 3 times a variable; in this case, <em>x</em>. So we have 3x

"The sun of 3x and 11" is saying add our 3x and 11, so: 3x + 11

8 0

3 years ago

Whats 4 to the 4th power perenthasis 4

Vinil7 [7]

65,536

you multiple 4 times 4 then you multiply 16 ties 16 times 16 times 16

6 0

3 years ago

Read 2 more answers