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3 years ago

Given:f(x)=3x^2+1,G(x)=2x-3,H(x)=x F(-2)= a.13 b.37 c.-11

Mathematics

1 answer:

olga55 [171]3 years ago

7 0

Answer:

13 is the answer:)

Step-by-step explanation:

f(-2)= 3* (-2)² + 1

= 3*4 + 1

= 13

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Marta walked at 4.9 miles per hour for 0.95 hours. how far did she walk

BartSMP [9]

Answer:

she walked 4.65 miles

Step-by-step explanation:

4.9 × 0.95

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3 years ago

Solve this asap plsss Giving 20 points ty <3

SCORPION-xisa [38]

Answer:

Step-by-step explanation:

first 2×2=4

then 16÷4

4×6

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3 years ago

Nagrom the Dwarf Queen desires a tunnel through the mountain to connect her two wealthiest cities, Yram and Haras, which lie on

ladessa [460]

This question requires us to use the cosine rule:

a^2 = b^2 + c^2 - 2bc*cos(A),

where A is the included angle between sides b and c, and a is the side of the triangle opposite to the angle.

In the context of the question, a is the length of the tunnel (let's call this t), b is 6 km, c is 7 km and A is 29°.

Given the values in the question and those we defined, we can rewrite the equation for the cosine rule as:

t^2 = 6^2 + 7^2 - 2(6)(7)cos(29)

Now, evaluating this we get:

t^2 = 36 + 49 - 84cos(29)

t^2 = 85 - 84cos(29)

t = sq.root (85 - 84cos(29))

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6 0

4 years ago

Read 2 more answers

Ef is the median of trapezoid abcd (please explain the answer im so confused lol)

Art [367]

Step-by-step explanation:

Okay, so...

The Median of a trapezoid is directly in the middle. For some weird mathimatical reason you won't ever need to know unless it's on an exam or you become a math major, its midsegment is the average of the top length and the bottom length.

In other words,

EF = ( BC + AD ) / 2

So for part 1, we can use that equation to find x.

$EF = ( BC + AD ) / 2$

Insert known equations.

$4x-18=[(x+12)+(3x-4)]/2$

Simplify within parentheses.

$4x-18=[x+12+3x-4]/2$

$4x-18=[x+3x+12-4]/2$

Add.

$4x-18=[4x+8]/2$

Divide.

$4x-18=2x+4$

Simplify.

$(4x-2x) +(-18+18)=(2x-2x)+(4+18)$

$2x=22$

Divide both sides by 2.

$x=11$

Part 2 is a lot easier now. All we have to do is plug in 11 for x.

$BC =x+12$

$BC = 11+12$

$BC = 23$

$AD = 4x-18$

$AD = 4(11)-18$

$AD = 44-18$

$AD = 26$

$EF = 3x-4$

$EF = 3(11)-4$

$EF = 33-4$

$EF = 29$

Answer:

Part I: x = 11

Part II:

BC = 23
AD = 26
EF = 29

4 0

3 years ago

Two sides of a triangle have lengths 7 and 16. What must be true about the length of the third side

ankoles [38]

Well it has to be either 23 or 9 because you have to add the two smallest sides also you have to subtract them . What are the options ?

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3 years ago