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3 years ago

7th grade Math help please

Mathematics

2 answers:

ankoles [38]3 years ago

7 0

Answer:

Step-by-step explanation:

Its D

Its not B because:

100-1=99 cant be less than 40+4=44

Good luck!

schepotkina [342]3 years ago

3 0

Answer: B. 100-h < 40+2h

Step-by-step explanation: If it says the first tank is less it probably is B and not D.

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Solve the equation with special factors. (Please show all steps) 16q^2 - 81 = 0

guapka [62]

Answer: $q=\frac{\sqrt{81}}{16}$

Step-by-step explanation:

$16q^2-81=0\\16q^2=0+81=81\\16q=\sqrt{81} \\q=\frac{\sqrt{81}}{16}$

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2 years ago

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Midpoint (10,4) Endpoint (9,-4), find the coordinates of the other endpoint.

mestny [16]

Answer:

(11, 12)

Step-by-step explanation:

Mid point coordinates:

x = (x₁ + x₂)/2
y = (y₁ + y₂)/2

Since midpoint and one endpoint given (10, 4) and (9, -4), the other endpoint:

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3 years ago

What are the coordinates of the endpoints of the midsegment for DEF that is parallel to DE

Nutka1998 [239]

Answer:

$\left(\dfrac{x_D+x_F}{2},\dfrac{y_D+y_F}{2}\right),$ $\left(\dfrac{x_E+x_F}{2},\dfrac{y_E+y_F}{2}\right).$

Step-by-step explanation:

Let points D, E and F have coordinates $(x_D,y_D),\ (x_E,y_E)$ and $(x_F,y_F).$

1. Midpoint M of segment DF has coordinates

$\left(\dfrac{x_D+x_F}{2},\dfrac{y_D+y_F}{2}\right).$

2. Midpoint N of segment EF has coordinates

$\left(\dfrac{x_E+x_F}{2},\dfrac{y_E+y_F}{2}\right).$

3. By the triangle midline theorem, midline MN is parallel to the side DE of the triangle DEF, then points M and N are endpoints of the midsegment for DEF that is parallel to DE.

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3 years ago

81.3 x 47.5 = i am lost............

Drupady [299]

Answer:

3861.75

Step-by-step explanation:

i hope its the good answer

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3 years ago