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2 years ago

How to multiple 90km/h x 1h 30min

Mathematics

1 answer:

sveta [45]2 years ago

7 0

90 km/ h x 1.5 h = 135 km

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Can someone please explain how to do number 9.

bogdanovich [222]

Answer:

x<15, probably

Step-by-step explanation:

maybe multiply 2 to each side to eliminate the fraction. so 3x+15<60. subtract 15 to isolate the variable term so 3x<45. divide by 3 to isolate x so x<15. check the work. is the inequality true for all values of x less than 15? let's try the first possible integer value, 14, to be sure. 3(14)+15= 57. so 57/2<30. now 57/2 is 28.5 and 28.5<30 so it seems right

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2 years ago

Find the domain over which the function y = x + 6x is monotonic increasing.

iragen [17]

Answer:

x > -3

$\sf (-3, \infty)$

Step-by-step explanation:

Domain: input values (x-values)

Monotonic increasing: always increasing.
A function is increasing when its graph rises from left to right.

The graph of a quadratic function is a parabola. If the leading term is positive, the parabola opens upwards. The domain over which the function is increasing for a parabola that opens upwards is values greater than the x-value of the vertex.

Vertex

Standard form of quadratic equation: $\sf y=ax^2+bx+c$

$\textsf{x-value of vertex}=\sf -\dfrac{b}{2a}$

Given function:

$\sf y=x^2+6x$

Therefore, x-value of function's vertex:

$\sf \implies x= -\dfrac{6}{2}=-3$

Final Solution

The function is increasing when x > -3

$\sf (-3, \infty)$

4 0

2 years ago

Andrew is putting reflective tape around the edge of a stop sign. The sign is a regular octagon, and each side is 11 inches long

Shkiper50 [21]

Answer:

88 inches

Step-by-step explanation:

We are finding the perimeter of the stop sign, therefor we have to either multiply or add the value of 11. Since this sign is an octagon we will have to multiply by eight or add 11 eight times. This will give you an answer of 88 inches.

7 0

2 years ago

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ki77a [65]

The measure to angle X is 44

6 0

2 years ago

Read 2 more answers

Convert this to degrees <img src="https://tex.z-dn.net/?f=%20%5Cfrac%7B3%7D%7B20%7D%20%5Cpi" id="TexFormula1" title=" \frac{3

dezoksy [38]

Here is the answer. Just click on the photo below. Hope this helps!