All categories

3 years ago

HELP PLEASE! THIS NEEDS TO BE DONE BEFORE 2:20!

Mathematics

2 answers:

sp2606 [1]3 years ago

6 0

C 6 times 40 plus 6 times 5

Ulleksa [173]3 years ago

5 0

6 · 45 =

6 · (40 + 5) =

6 · 40 + 6 · 5 =

C. 6 · 40 + 6 · 5

You might be interested in

Find the surface Area.

kompoz [17]

Answer: 20

Step-by-step explanation: how i got the answer was to multiply everything by two. then add everything together.

3 0

3 years ago

Plz help its 7th grade math

Alinara [238K]

627282638392926392928373

5 0

3 years ago

Read 2 more answers

Two jets leave an air base at the same time and travel in opposite directions. One jet travels 94 mi/h slower than the other. If

maw [93]

Answer:

1478 mi/h

Step-by-step explanation:

The rate of change is the distance divided by the time.

$\text{Rate of change} = \dfrac{\text{distance}}{\text{time}} = \dfrac{\text{2956 mi}}{\text{2 h}} = \textbf{1478 mi/h}$

4 0

3 years ago

Sin^2(x/2)=sin^2x <br> Find the value of x

Veronika [31]

$\sin^2\dfrac x2=\sin^2x$
$\dfrac{1-\cos x}2=1-\cos^2x$
$1-\cos x=2-2\cos^2x$
$2\cos^2x-\cos x-1=0$
$(2\cos x+1)(\cos x-1)=0$
$\implies\begin{cases}2\cos x+1=0\\\cos x-1=0\end{cases}$ $\implies\begin{cases}\cos x=-\frac12\\\cos x=1\end{cases}$

The first case occurs in $0\le x$ for $x=\dfrac{2\pi}3$ and $x=\dfrac{4\pi}3$ . Extending the domain to account for all real $x$ , we have this happening for $x=\dfrac{2\pi}3+2n\pi$ and $\dfrac{4\pi}3+2n\pi$ , where $n\in\mathbb Z$ .

The second case occurs in $0\le x$ when $x=0$ , and extending to all reals we have $x=2n\pi$ for $n\in\mathbb Z$ , i.e. any even multiple of $\pi$ .

6 0

4 years ago

What is 2(8x-3) -4(3x-5)=19

vladimir1956 [14]

Answer:

5/4

Step-by-step explanation:

2(8x-3)-4(3x-5)=19

16x-6-12x+20=19

16x-12x-6+20=19

4x+14=19

4x=19-14

4x=5

x=5/4

7 0

3 years ago