Write a cosine function that has a midline of 5 an amplitude of 2 and a period of 5/2

7a+5=61 what is a in the equation

MrRa [10]

Answer:

a=8

Step-by-step explanation:

7 0

2 years ago

Read 2 more answers

A scale for a scale drawing is 17 cm:1 mm. Which is larger, the actual object or the scale drawing?

Dvinal [7]

9514 1404 393

Answer:

the scale drawing is larger

Step-by-step explanation:

The scale tells you that ...

17 cm on the scale drawing represent 1 mm on the actual object.

17 cm is larger than 1 mm, so the scale drawing is larger.

5 0

3 years ago

Solve photo question, please.

Andru [333]

X>-2
any point to the right of x=-2 is a solution

y<2x+7
to find, plot 2 points by subsitution
when x=0, y=7
when x=1, y=9
plot the points (0,7) and (1,9)

the point is (-1,4)

draw a line through them
then try a point to see which side to shade on
is 0,0 in that shaded reigon?
no
shade below

look at shaded reigon

7 0

2 years ago

Which are the solutions of x2 = –13x – 4? 0, 13 0, –13 StartFraction 13 minus StartRoot 153 EndRoot Over 2 EndFraction comma Sta

klasskru [66]

Solution of the given expression $x^2 = -13x-4$ is $x=\frac{-13+\sqrt{153}}{2}\,\,and\,\,x=\frac{-13-\sqrt{153}}{2}$

Correct options are: Start Fraction negative 13 minus Start Root 153 End Root Over 2 End Fraction comma Start Fraction negative 13 + Start Root 153 End Root

Step-by-step explanation:

We need to find solutions of $x^2 = -13x-4$

We need to solve the quadratic equation and find values of x.

Solving:

$x^2 = -13x-4$

Rearranging the terms:

$x^2+13x+4=0$

Solving the quadratic equation using quadratic formula:

$x=\frac{-b\pm\sqrt{b^2-4ac}}{2a}$

where a = 1, b= 13 and c=4

putting values:

$x=\frac{-b\pm\sqrt{b^2-4ac}}{2a}\\x=\frac{-(13)\pm\sqrt{(13)^2-4(1)(4)}}{2(1)}\\x=\frac{-13\pm\sqrt{169-16}}{2}\\x=\frac{-13\pm\sqrt{153}}{2}\\x=\frac{-13+\sqrt{153}}{2}\,\,and\,\,x=\frac{-13-\sqrt{153}}{2}$

So, Solution of the given expression $x^2 = -13x-4$ is $x=\frac{-13+\sqrt{153}}{2}\,\,and\,\,x=\frac{-13-\sqrt{153}}{2}$

Correct options are: Start Fraction negative 13 minus Start Root 153 End Root Over 2 End Fraction comma Start Fraction negative 13 + Start Root 153 End Root

Keywords: Solving Quadratic Equations

Learn more about Solving Quadratic Equations at:

#learnwithBrainly

5 0

2 years ago

Read 2 more answers

Please help!! what is the value of x? enter your answer

Jet001 [13]

Answer:

Step-by-step explanation:

BR is parallel to QC therefore ΔBDR and ΔQDC are similar.

The sides are in proportion: