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2 years ago

11

Darius is going home from college for the weekend. He checked google maps and found that his house is 480 miles away. If he want

s to drive at a constant speed, and drive in exactly 8 hours, then what should his speed be?

1 answer:

Vesnalui [34]2 years ago

8 0

Answer:

60.

Step-by-step explanation:

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For what value(s) of k is the linear system consistent? (Enter your answers as a comma-separated list.)

AleksAgata [21]

Answer:

Step-by-step explanation:

Given

$6x_1-9x_2=8$

$9x_1+kx_2=-1$

The given system is $AX=B$ can be represented by

$\begin{bmatrix}6 &-9 \\ 9 & k\end{bmatrix}\begin{bmatrix}x_1\\ x_2\end{bmatrix}=\begin{bmatrix}8\\ -1\end{bmatrix}$

The given system is consistent when determinant of A is not equal to zero

$|A|$

$|A|=6k-(-81)=6k+81$

$k\neq \frac{-27}{2}$

i.e. system is consistent for all value of k except $k=\frac{-27}{2}$

$R-\frac{-27}{2}$

4 0

3 years ago

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Solve for x:<br> ✓72 +95 – 1 = 8<br> What would X be?

lesya [120]

2 MILLIONNNNNNNNNNNNNNNNNN

3 0

3 years ago

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A cylinder has radius 2.5 cm and lateral area 20 pi cm^2. What is the surface area of the cylinder in terms of pi?

Novosadov [1.4K]

This is the concept of areas of solid materials; the surface area of the cylinder whose radius is 2.5 cm and lateral area is 20 pi cm^2 will be: Surface area of cylinder is given by:
SA=(area of cyclic sides)+(lateral area)
SA=2πr^2+πrl
Area of the cyclic sides will be:
Area=2πr^2
=2*π*2.5^2
=12.5π cm^2
The lateral area is given by:
Area=20π cm^2
Therefore the surface area of cylinder will be:
SA=(12.5π+20π) cm^2
SA=32.5π cm^2
The answer is 32.5π cm^2

4 0

3 years ago

3/4 divided by 4/5 is 15/16 is it in its lowest terms

Softa [21]

Answer:

yes it cant be siplified anymore

Step-by-step explanation:

8 0

3 years ago

Hi i will give 50 POINTS and BRAINLIEST to whoever answers this question <br>

Alina [70]

Answer:

$\boxed{4 : 1}$

Step-by-step explanation:

Colored Fabric = 48 mm

White Fabric = 1.2 cm

<u><em>Ratio of white fabric to colored fabric is:</em></u>

48 mm : 1.2 cm

To express any ratio, we need to equalize the units ( 1 cm = 10 mm)

=> 48 mm : 12 mm

÷12 ÷12

=> 4 : 1

3 0

2 years ago

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