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3 years ago

Evaluate f(−3) for f(x)=2x2−x+5.

Mathematics

1 answer:

Natasha2012 [34]3 years ago

7 0

Answer: -4

Step-by-step explanation:

2(-3)*2-(-3)+5= -4

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What percent of 143 is 95.1?

Aloiza [94]

Answer:

66.5%

Step-by-step explanation:

95.1/143*100=66.5%

4 0

3 years ago

Read 2 more answers

The hours of daylight, y, in Utica in days x from January 1, 2013 can be modeled by the equation y = 2.89sin(0.0145x-1.40) + 10.

Pie

Answer:

9.3 hours

Step-by-step explanation:

Given

$y = 2.89\sin(0.0145x-1.40) + 10.99.$

Required

Hours of sunlight on Feb 21, 2013

First, calculate the number of days from Jan 1, 2013 to Feb 21, 2013

$days = 52$

So:

$x = 52$

So, we have:

$y = 2.89\sin(0.0145x-1.40) + 10.99.$

$y = 2.89\sin(0.0145*52-1.40) + 10.99.$

$y = 2.89\sin(0.754-1.40) + 10.99.$

$y = 2.89\sin(-0.646) + 10.99.$

$y = 2.89*-0.6020 + 10.99.$

$y = -1.740 + 10.99.$

$y = 9.25$

$y = 9.3$ --- approximated

8 0

3 years ago

Simplify 3ab + 4ab + 5

Anettt [7]

Simplify 3ab + 4ab + 5
= 7ab + 5 (combine like terms)

hope it helps

5 0

3 years ago

Read 2 more answers

845 ÷ 73 Divide. What is the remainder?

Leviafan [203]

Answer:

Step-by-step explanation:

73*11= 803

845-803= 42

4 0

2 years ago

A flag pole has a rope that attaches to the ground from the top of the flagpole the rope create a 30° angle with the ground and

OLEGan [10]

Answer:

$5.77\ \text{m}$

$11.54\ \text{m}$

Step-by-step explanation:

p = Height of pole

h = Length of role

b = Distance between the bottom of the rope and bottom of the pole = 10 m

$\theta$ = Angle between the rope and the ground = $30^{\circ}$

$\tan\theta=\dfrac{p}{b}\\\Rightarrow p=b\tan\theta\\\Rightarrow p=10\tan30^{\circ}\\\Rightarrow p=5.77\ \text{m}$

The length of the rope is $5.77\ \text{m}$

$\cos\theta=\dfrac{b}{h}\\\Rightarrow h=\dfrac{b}{\cos\theta}\\\Rightarrow h=\dfrac{10}{\cos30^{\circ}}\\\Rightarrow h=11.54\ \text{m}$

The length of the pole is $11.54\ \text{m}$

3 0

3 years ago