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3 years ago

Explain the difference between evaluating 3 * 7 - 4 ÷ 2 and evaluating 3(7 - 4) ÷ 2.

Mathematics

2 answers:

Bogdan [553]3 years ago

6 0

DIY. I believe in you, its just a matter if you believe in yourself. Your welcome

shusha [124]3 years ago

5 0

In 3(7-4)/2 you have you have to multiply 3 by 7 and by -4 and the answer would be 21-12/2=9/2 or 4.5. While in 3 * 7 -4/2 you will have to multiply 3 by 7 only and your answer will be 21 -4/2=17/2 or 8.5.

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Find the length of the missing side of the triangle below.

qaws [65]

let's call the red triangle R, and the blue triangle B.

big/small

2.5/1.75 = 1.43 (rounded)

1.6/1.12 = 1.43 (rounded)

missing side: 2.35 x 1.43 = 3.36

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3 years ago

Manny made $102.05 for 6.5 hours of work. How much did he make per hour?

Sphinxa [80]

Answer:

$15.70/hr

Step-by-step explanation:

The unit rate (amount earned per hour) is calculated as follows:

$102.05

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3 years ago

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tia_tia [17]

3^5 * 6^-6 / 3^3 * 6^-4
= 3^2 6^-2
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answer
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3 years ago

Tobias sent a chain letter to his friends, asking them to forward the letter to more friends. The number of people who receive t

malfutka [58]

Answer:

$P(t)=37\times (4)^{(t/9.1)}$

Explanation:

The number of emails is multiplied by 4 every 9.1 weeks.

Thus, since Tobias initially sent the chain letter to 37 friends, the number of letters will grow as per this geometric series:

Start: 37 letters

In 9.1 weeks: 37 × 4

In 2 × 9.1 weeks: 37 × (4)²

In 3 × 9.1 weeks: 37 × (4)³

As you see, the exponent is the number of weeks divided by 9.1

Thus, if your variable is the number of weeks, t, then the exponent is t/9.1

And the exponential function, P(t) will be:

$P(t)=37\times (4)^{(t/9.1)}$

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3 years ago

What divides a two dimensional shape into two congruent shapes

zaharov [31]

Answer:

Rectangle is a 2dimensional shape so, let me explain using it

The diagonal of a rectangle divides the rectangle into two triangles that are congruent and they are the same size and shape.

Another example is parallelogram

The diagonal of a parallelogram also divides the figure into two triangles that are congruent.

Step-by-step explanation:

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4 years ago