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likoan [24]
3 years ago
7

On a number line, the surface of a river is marked at −225 feet and the top of a building is marked at +18 feet, where 0 represe

nts sea level. What do −225 and +18 represent? 225 feet above sea level and 18 feet below sea level 225 feet below sea level and 18 feet above sea level 225 feet below sea level and 18 feet above 225 225 feet above sea level and 18 feet below 225
Mathematics
2 answers:
gizmo_the_mogwai [7]3 years ago
7 0

Answer:

225 feet below sea level, 18 feet above sea level.

Step-by-step explanation:

Negative represents below, if the 0 is sea level, and positive represents above.

tatuchka [14]3 years ago
4 0

Answer:

Option B.

Step-by-step explanation:

The surface of a river has been marked as (-225) feet and the top of the building at (+18) feet.

If we consider surface sea as a base line to calculate the altitudes of certain place, then altitudes above the the river surface will be positive and the altitudes below the river surface will be negative.

Therefore, (-225) feet of a river means 225 feet below the sea level.

+18 feet of a building means 18 feet above the sea level.

Option B, is the answer.

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Jon Kent's parents subtracted $3,500 from their adjusted gross income when they listed him as an exemption on their tax return .
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Answer: 3,917

Step-by-step explanation:

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HELP ASAP.
8090 [49]

Hey there!

#1 ⬇️

6 × 6 × 6 × 6 × 6

6 × 6 = 36

36 × 36 × 6

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#2 ⬇️

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6 0
2 years ago
If GF is a midsegment of CDE, find CD.<br><br> A. 3.4<br><br>B. 6.8 <br><br>C. 13.6 <br><br>D. 14
bogdanovich [222]

Answer:

C


Step-by-step explanation:

Triangle CGF and triangle CED are similar. Hence, the ratio of their corresponding sides are equal. Thus we can write:

\frac{5x+4}{2x+3}=\frac{CD}{3x+0.8}

<em>We can now cross multiply and solve for CD:</em>

\frac{5x+4}{2x+3}=\frac{CD}{3x+0.8}\\(5x+4)(3x+0.8)=(2x+3)(CD)\\15x^2+4x+12x+3.2=(2x+3)(CD)\\15x^2+16x+3.2=(2x+3)(CD)\\CD=\frac{15x^2+16x+3.2}{2x+3}

Since GF is a midsegment of CDE, CD is double of CF. So we can write:

CD=2CF\\\frac{15x^2+16x+3.2}{2x+3}=2(3x+0.8)\\\frac{15x^2+16x+3.2}{2x+3}=6x+1.6\\15x^2+16x+3.2=(6x+1.6)(2x+3)\\15x^2+16x+3.2=12x^2+18x+3.2x+4.8\\15x^2+16x+3.2=12x^2+21.2x+4.8\\3x^2-5.2x-1.6=0

<em>By using quadratic formula \frac{-b+-\sqrt{b^2-4ac} }{2a} and with a=3, b= -5.2, and c= -1.6, we find the value of x to be:</em>

\frac{5.2+-\sqrt{(-5.2)^2-4(3)(-1.6)} }{2(3)}=2


<em>Since the expression for CD is \frac{15x^2+16x+3.2}{2x+3} , we plug in x=2 into this expression to find value of CD:</em>

\frac{15(2)^2+16(2)+3.2}{2(2)+3}=13.6

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6 0
3 years ago
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Re-write the quadratic function below in Standard Form y= -9(x+3)2+2
disa [49]

Answer:

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Step-by-step explanation:

we all know and love(being 100% sarcastic here)the standard form  as

ax+by=c

y=-9(x+3)*2+2----This is weird and not so nice

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-52=18x+y

18x+y=-52

HOPE THIS HELPS

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