Select the correct answer.

Mathematics

1 answer:

lisabon 2012 [21]3 years ago

3 0

Answer: Every quadratic has a (single) y-intercept. The reason for this is that the y-intercept is the function value at x = 0, and we can always substitute x = 0 into the quadratic. Thus, the y-intercept of the quadratic function y = ax2 + bx + c is c.

Step-by-step explanation:

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Find the surface area

White raven [17]

Answer:299 cm

Step-by-step explanation: you have to find the area of square and rectangle. 33*6.5 = 214.5 plus 13 * 6.5 = 84.5 then add together

214.5 + 84.5 = 299cm

6 0

2 years ago

A flagpole is located at the edge of a sheer y = 70-ft cliff at the bank of a river of width x = 40 ft. See the figure below. An

Gnom [1K]

I would solve this using tangents. Let h be height of flagpole.
Set up 2 right triangles, each with a base of 40.
The larger triangle has height of "h+70"
Smaller triangle has height of 70.

Now write the tangent ratios:
$tan A = \frac{h+70}{40} , tan B = \frac{70}{40}$

Note: A-B = 9
To solve for h we need to use the "Difference Angle" formula for Tangent
$tan (A-B) = \frac{tanA - tanB}{1+tan A tan B}$
Plug in what we know:
$tan(9) = \frac{ \frac{h+70}{40} - \frac{70}{40}}{1+ (\frac{h+70}{40})(\frac{7}{4})}$
$tan (9) = \frac{ \frac{h}{40}}{ \frac{7h +650}{160}} = \frac{4h}{7h+650}$
$h = \frac{650 tan(9)}{4-7 tan(9)}$
$h = 35.6$

7 0

3 years ago

Triangle MRN is created when an equilateral triangle is folded in half.

madam [21]

Answer:

I'm pretty sure it is 4units

Step-by-step explanation:

try using a^2+b^2=c^2 formula to solve!

Hope this helps!

5 0

3 years ago

Read 2 more answers

Identify the graphs that represent liner function check all that apply

11111nata11111 [884]

Answer:

Step-by-step explanation:

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3 years ago

You are paid $78 for 61/2 hours of work. What is your rate of pay?

Igoryamba

78÷ 6 1/2 =
78 ÷ 13/2 =
78 × 2/13 =
156/13 = 12

12 dollars per hour

4 0

3 years ago