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2 years ago

Select all of the expressions that are equivalent to 3(4x + 5y).

Mathematics

2 answers:

rusak2 [61]2 years ago

5 0

Answer:

3*4x+3*5y

12x+15y

2*3x*2+2*7.5y

Harman [31]2 years ago

4 0

2* 3x* 2+2* 7.5y
Explaining

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What is the first step in solving this equation? 3(2x+6)-4x 2(5x- 2) +6 Use the subtraction property of equality to subtract 6 f

LekaFEV [45]

Answer:

Use the distributive property on each side of the equation.

Explanation:

PEMDAS

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3 years ago

A tourist first walked 17km with a speed of v km/h. Then he hiked 12 km uphill with the speed that was 2 km/hour less than his o

ExtremeBDS [4]

Answer: $t=\frac{17}{v}+\frac{12}{v-2}$

Step-by-step explanation:

Given: A tourist first walked 17km with a speed of v km/h.

Since $Speed=\frac{distance}{time}$

therefore, $Time=\frac{distance}{speed}$

Let $t_1$ be the time he walked with speed v.

then $t_1=\frac{17}{v}$

Also he hiked 12 km uphill with the speed that was 2 km/hour less than his original speed.

Let $t_2$ be the time he hiked 12 km,

Then $t_2=\frac{12}{v-2}$

The total time for the whole trip is given by:-

$t=t_1+t_2=$

Substitute the values of $t_1$ and $t_2$ in the equation, we get

$t=\frac{17}{v}+\frac{12}{v-2}$

4 0

3 years ago

Right answer gets brainlist

elena55 [62]

Answer:

546

Step-by-step explanation:

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plug in 21 10.5 and 2.5

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2 years ago

10 is 32% of what number?

Fantom [35]

Answer:

x= 3,2

Step-by-step explanation:

10 ---------------- 100%

x ---------------- 32%

$x=\frac{10\times32\%}{100\%}$

$x=\frac{10\times32}{100}$

$x=\frac{320}{100}$

$x=\frac{32}{10}$

$x=\frac{32\div2}{10\div2}$

$x=\frac{16}{5}$

$x=3,2$

7 0

3 years ago

You pick a card at random. Without putting the first card back, you pick a second card at random. 1 2 3 4 5 6 7 8 What is the pr

vovangra [49]

Answer:

%12.8 for the card withe the number 1

%37.8 for the odd number

Step-by-step explanation:

you only have a number one card so thats 1/8 and when converted to percentage is %12.8

theres 3 odd numbers not counting the 1 so thats 3/8 coverted to percent is %37.8

to find percentage to multiply the Numerator by Denominator and multiply by 100

Feel free to ask for more help :)

4 0

2 years ago