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3 years ago

HELP PLZ ASPUse properties to evaluate the expression. (13 + 6) + 4 A. 19 B. 23 C. 27 D. 37

2 answers:

7 0

Well first you HAVE to use properties so that means PEMDAS.

P stands for <span>parenthesis,
E stands for exponents,
M for multiplication,
D for division,
A for addition,
S for subtraction

So as you can see you have 2 properties in the expression E and A properties.
E will be done first becuz the letter E comes before A in PEMDAS (13+6) equals 19 then you add 4.

19+4= 23

YOUR ANSWER IS: B- 23

</span>

ELEN [110]3 years ago

4 0

The answer is 23 hope this helped

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Cammie can mow 1/2 acre in 25 minutes. If her rate is constant, Cammie says she can mow 1 1/4 acres in one hour. Is Cammie corre

Sergeu [11.5K]

Answer: No, Cammie is not correct. She can mow $1\frac{1}{5}\ acres$ in one hour (See explanation).

Step-by-step explanation:

Convert the mixed number to an impoper fraction:

1. Multiply the whole number part by the denominator of the fraction and add the product to the numerator.

2. The denominator does not change.

Then:

$1\frac{1}{4}=\frac{(1*4)+1}{4}=\frac{5}{4}$

Let be "x" the acres Cammie can mow in one hour.

You know that she can mow $\frac{1}{2}\ acre$ in 25 minutes, then you can set up the following proportion (Remember that 1 hour has 60 minutes):

$\frac{\frac{1}{2}}{25}=\frac{x}{60}$

Solving for "x", you get:

$\frac{\frac{1}{2}}{25}=\frac{x}{60}\\\\(60)(\frac{1}{50})=x\\\\x=\frac{6}{5}$

Convert from improper fraction to mixed number:

1. When you divide 6 by 5, the quotient is 1. This will be the whole number part.

2. The remainder is 1. This will be the numerator.

3. The denominator does not change.

Then:

$x=1\frac{1}{5}$

Therefore, she can mow $1\frac{1}{5}\ acres$ in one hour.

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Step-by-step explanation:

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Step-by-step explanation:

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