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Archy [21]
3 years ago
9

5) Jessica has to take a train from New York to New Jersey. She looks at the map to plot her route. If 1cm equals 10

Mathematics
1 answer:
Greeley [361]3 years ago
3 0

Answer:

48 miles

Step-by-step explanation:

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Someone please help!!!!!!
zhuklara [117]

Answer:

The first one luv

Step-by-step explanation:

6 0
3 years ago
3h-2(4h-5)=10-5h A-0 B-4 C-infinity many solutions D-no solutions​
Crank

Answer:

Step-by-step explanation:

3h - 8h + 10 = 10 - 5h

-5h + 10 = 10 - 5h

10 = 10

infinitely many solutions

7 0
3 years ago
surveyor stands 100 m from the base of a tower on which an antenna stands. He measures the angles of elevation to the top and bo
balu736 [363]

Answer: 36.3m

Step-by-step explanation:

To solve this, we can draw two triangle rectangles, where the distance between the man and the base of the tower is one of the cathetus, the adjacent one, the height will be the opposite cathetus.

The triangle where the elevation angle is 58° is associated with the height of the tower without the aerial

The other triangle, where the elevation angle is 63° is associated with the height of the tower with the aerial.

Then we can calculate those two heights, then compute the difference, and the difference will be equal to the height of the aerial.

In both cases we want to calculate the opposite cathetus, then we should use the relation:

Tan(θ) = (Op. cath)/(Adj. cath)

The height without the aerial is h1, let's find it:

Tan(58°) = h1/100m

Tan(58°)*100m = h1 = 160m.

The height with the aerial is h2, let's find it:

Tan(63°) = h2/100m

Tan(63°)*100m = h2 = 196.3m

Then the height of the aerial will be:

h2 - h1 =  196.3m -  160m = 36.3m

6 0
3 years ago
Explain why vertical lines are a special case in the definition of parallel lines.
Nookie1986 [14]

Answer:

A vertical line has an infinite or undefined slope since the denominator is zero.

Step-by-step explanation:

Parallel lines by definition refers to lines that never intersect or meet since they have identical slopes. The slope of line is defined as;

(change in y)/(change in x)

For a vertical line, the y values are changing while the x values remain constant. The slope of this line will thus have a zero value in the denominator implying that its slope will not defined or will be infinity.

6 0
3 years ago
Read 2 more answers
Write the expression in standard form. five divided by quantity three minus fifteen i.
EleoNora [17]
Standard form is a+bi where a and b are real numbers
remeber that i²=-1

ok

\frac{5}{3-15i}
we got to get the i out of the denomenator
remember the differnce of 2 perfect squares where (a-b)(a+b)=a²-b²

so multiply the whole thing by \frac{3+15i}{3+15i}
we get
\frac{5(3+15i)}{3^2-(15i)^2}=\frac{15+75i}{9-225(-1)}=\frac{15+75i}{9+225}=\frac{15+75i}{234}=\frac{15}{234}+\frac{75i}{234}=\frac{15}{234}+\frac{75}{234}i=\frac{5}{78}+\frac{25}{78}i

in standard form, it is \frac{5}{78}+\frac{25}{78}i
5 0
4 years ago
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