3 years ago

Evaluate -4x^2 + 2x - 6 when x = -2.

Mathematics

1 answer:

trasher [3.6K]3 years ago

7 0

Answer:

-26

Step-by-step explanation:

-4(-2)^2 + 2(-2) - 6

-4(4) + -4 - 6

-16 -10

-26

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2 vertical buildings are 42 metres apart and the shorter building is 135m high. The angle of elevation from the top of the short

ipn [44]

Answer:

Step-by-step explanation:

base=42 m

height=h=?

base angle θ=60°

tan 60=h/42

h=42tan 60=42√3≈72.75 m

height of taller building=135+42√3 m≈135+72.75≈207.75 m≈208 m

6 0

2 years ago

Express as a trinomial (3x+8) (x+10)

docker41 [41]

Answer:

$3x^{2} +38x+80$

Step-by-step explanation:

Hello!

A trinomial is a expression consisting of three different terms

To turn this into a trinomial we multiply everything to each other

3x * x = $3x^{2}$

3x * 10 = 30x

8 * x = 8x

8 * 10 = 80

Now we put them all together in an equation

$3x^{2} +30x+8x+80$

Combine like terms

$3x^{2} +38x+80$

The answer is $3x^{2} +38x+80$

Hope this helps!

7 0

3 years ago

The datus a blow shows the weigh-in pounds of 5 different pumpkin what is the mean of the following set of data 7 5 9 5 12

gregori [183]

7+5+9+5+12=38

38/5=7.6

7.6=mean

hope this helps

4 0

3 years ago

4 more than a number is no more than 13

Crank

Answer:

Step-by-step explanation:

3 0

3 years ago

Read 2 more answers

Roberta needs ribbon for a craft project. The ribbon sells for $3.74 per yard. Find the cost, in dollars, for 48 inches of the r

almond37 [142]

You have to convert 1 yard to 36 inches. so you do 3.74×3.74(1/3) because the extra 12 inches is one third of a yard. You eventually get 4.986 which rounds to 4.99

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3 years ago