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3 years ago

HELP PLEASE.I guess I'm wondering if I'm right or not.

Mathematics

2 answers:

LenKa [72]3 years ago

7 0

Yes you are correct.

Dmitry_Shevchenko [17]3 years ago

7 0

Yes, you are correct

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Least to greatest 0.2m,0.09m,0.10m

Nimfa-mama [501]

.09m then .10m then .2m

4 0

3 years ago

What is the solution (pls help ASAP )

Zarrin [17]

Answer:

c the factor of the inequality is correct - took this test already

Step-by-step explanation:

4 0

3 years ago

Two children own two-way radios that have a maximum range of 3 miles. One leaves a certain point at 1:00 P.M., walking due north

Grace [21]

Answer:

The answer is 21 minutes

Step-by-step explanation:

We use the equation Xf = Xo + vt

1) At 1:00 PM, child one leaves the starting point heading north at a constant velocity of 6 mi/hr or .1 [mi/min] (divide by 60 to convert from [mi/hr] to [mi/min])

2) He walks for 15 minutes before kid 2 starts walking. In 15 minutes he is able to cover 1.5 [mi]

$x_{1f1} =x_{o} +v_{1} t_{1} \\x_{1f1} =0+.1(15)\\x_{1f1} =1.5 [mi]$

3) Now, child 2 starts walking and we know that when the range reaches 3 miles, they won´t be able to communicate. So the sum of the final position of child 1 and child 2 must be 3[mi]

Child 1 final position => $x_{1f} = x_{1f1} +v_{1} t\\x_{1f} =1.5+v_{1} t$
Child 2 final position => $x_{2f} =0+v_{2} t$

4) Sum the equations and equate to 3

$x_{1f} +x_{2f} =3$

5) Substitute the values we already know

$1.5+v_{1} t+v_{2}t=3\\ 1.5+.1t+.15t=3\\1.5+.25t=3\\t=\frac{3-1.5}{.25} \\t=6 [min]$

6) in 15 + 6 minutes they will be 3miles apart

7) In 21 minutes they will still be able to communicate with one another.

7 0

3 years ago

1. WILL MARK BRAINLIEST!!! HELP!

MatroZZZ [7]

Answer:

$\frac{7}{x+7}$

Step-by-step explanation:

Step 1: Pull a 7 from the top

$\frac{7x + 42}{x^2 + 13x + 42}$

$\frac{7(x + 6)}{x^2 + 13x + 42}$

Step 2: Factor the bottom

$\frac{7(x + 6)}{(x + 7)(x + 6)}$

Step 3: Cancel the top (x+6) and the bottom (x+6)

$\frac{7}{x+7}$

Answer: $\frac{7}{x+7}$

6 0

3 years ago

Simplify the expression 10-4x(6+5-1) divided by 8+7

Eddi Din [679]

Simple,

writing out the problem...

$\frac{10-4x(6+5-1)}{15}$

Simplify it...

-4x(6+5-1)

-4x(11-1)

-4x(10)

-40x

Making it look like...

$\frac{10-40x}{15}$

Cancel out the common factors...

Thus making the answer:

$- \frac{2(4x-1)}{3}$ .

8 0

3 years ago