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rosijanka [135]
3 years ago
12

Help please,

Mathematics
1 answer:
saul85 [17]3 years ago
3 0
Domain is the numbers you can use
see we have rom x<-3 and x≥-3
therefor it is all real numbers for the domain




domain=all real numbers

and the range is the output
for all numbers less than -3, we have x+4, so -10+3=-7, so it extends infinetely in negative direction
and for x^2+6, you start with -3 which ends with (-3)^2+6=9+6=13, after that it gets bigger

so therefor the range is
from -∞ to -7, not including -7 and from 13 to positive infinity
in interval notation
(-∞,-7)U[13,∞)

domain=all real number
range=(-∞,-7)U[13,∞) or all real numbers except all numbers c, such that -7≤c<13


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Ivan has cut 19 pieces of reinforcing bar​ (rebar) that are each 1.14 meters long. What is the total length of the rebar used fo
madreJ [45]

Answer:

The total length of rebar used is  21.66 meters.

Step-by-step explanation:

Given:

Ivan had cut a reinforcing bar in 19 pieces and length of each bar is 1.14 meters.

Number of pieces = 19

Length of each piece = 1.14

We need to find the total length of reinforcing bar.

To calculate the total length we will multiply number of pieces with length of each piece.

Hence,

Total length of rebar = Number of pieces × Length of each piece = 19\times1.14 = 21..66 m

Rounding to nearest hundred = 21.66 m

Hence the total length of reinforcing bar is 21.66 meters.

4 0
3 years ago
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Artyom0805 [142]

Answer:

40 pounds of nuts worth $1.60

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Step-by-step explanation:

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5 0
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A ladder leans against a 22-feet-tall apple tree. The base of the ladder forms a 42° angle with the ground. Approximately how ta
igomit [66]

(D) 33 feet

<u>Explanation:</u>

Given:

Height of the tree, h = 22 feet

angle, θ = 42°

Length of the ladder, l = ?

We know:

sin θ = Perpendicular / hypotenuse

So,

Sin θ = height of the tree / length of the ladder

sin 42^0 = \frac{22}{l} \\\\0.67 = \frac{22}{l} \\\\l = 32.84 feet

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6 0
3 years ago
Describing trends in scatter plots1The graph below shows the relationship between life expectancyand infant mortality rate in a
rosijanka [135]
Given

The graph of the infant mortality rate and life expectancy is given in the scatter form.

Explanation

To determine the relation between the life expectancy and infant mortality rate ,

use the given graph.

From the graph given, it is clear that as the infant mortality rate increases then the life expectancy decreases.

Therefore, the countries with high mortality rates tended to have shorter life expectancies.

Answer

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5 0
1 year ago
1/6 Book
GalinKa [24]

<u>Given:</u>

\frac{1}{6} \text{ book in } \frac{2}{3} \text{ hours}

<u>To find:</u>

Number of books per hour

<u>Solution:</u>

We have to calculate the book read in one hour.

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8 0
3 years ago
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