PlEASE I REALLY NEED HELP PLEASE I BEG OF YOU PLEASE!

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Answer 1

Answer:

Answer:

sure whats the question ? :)

Step-by-step explanation:

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A pair of angles whose sum is 90 degrees are called _____ angles.
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How do I solve f(x)=-0.1x^2+3.2x-3.5

Answers

Convert into Slope-Intercept Form--------------------------->y= −0.1x^2 + 3.2x − 3.5

Which expression has a value of 15 when n = 7?1: 43 minus 5 n
2: 3 n minus 5
3: 6 n minus 28
4: 19 minus StartFraction 28 Over n EndFraction

Answers

Answer:

$19-(28)/(n)$ is the expression with the value of 15 when n = 7

Step-by-step explanation:

To find the expression whose value is 15, substitute the value of n = 7 in each given expression.

Expression 1:

$43-5n$

Substitute the value of n & simplify,

$43-5(7)$

$43-35=8$

Since the value of the expression is 8 which is not equal 15.

Hence expression $43-5n$ does not have value of 15 when n = 7.

Expression 2:

$3n-5$

Substituting the value of n & simplify,

$3(7)-5$

$21-5=16$

Since the value of the expression is 16 which is not equal 15.

Hence expression $3n-5$ does not have value of 15 when n = 7.

Expression 3:

$6n-28$

Substituting the value of n & simplify,

$6(7)-28$

$42-28=14$

Since the value of the expression is 14 which is not equal 15.

Hence expression $6n-28$ does not have value of 15 when n = 7.

Expression 4:

$19-(28)/(n)$

Substituting the value of n & simplify,

$19-(28)/(7)$

$19-4=15$

Since the value of the expression is 15 which is equal 15.

Hence expression $19-(28)/(n)$ has the value of 15 when n = 7.

(5x2 + 2x + 11) - (7 + 4x - 2x2)9 - 2x - 2x2
3x2 - 2x + 4
3x2 + 6x + 4
7x2 - 2x + 4

Answers

The answer is 7x^2 - 2x + 4, so answer D.

Your answer should be D!

Find the value of the expression below for r = 4 and t = 2
t^3 - r + 20 divided by r

Answers

Answer:

The value of the expression $t^3-r+(20)/(r)$ is, 9

Step-by-step explanation:

Given: The expression $t^3-r+(20)/(r)$

Substitute the value of r=4 and t=2 in above expression to find its value;

$t^3-r+(20)/(r) = (2)^3-4+(20)/(4)$

Cube: the cube of a number t is its third power, the result of the number multiplied by itself twice. i.e, $t^3 = t * t * t$

Now, solve further we have;

$(2)^3-4+(20)/(4) = 8 -4+(20)/(4)$

Further, divide the number 20 by 4 we get the result 5 ;

⇒ 8-4+5 = 4+5 =9

Therefore, the value of the expression $t^3-r+(20)/(r)$ is, 9.

What is the x-intercept of the line with this equation −2x 12y=18 enter your answer in the box. (?, 0)

Answers

Answer:

x-intercept of the given line is, (-9, 0)

Step-by-step explanation:

x-intercept says that a line crosses the x-axis

Substitute y = 0 and solve for x.

As per the statement:

An equation of line is given as:

$-2x+2y = 18$

To find the x-intercept:

Substitute y = 0 and solve for x:

$-2x+12(0) = 18$

⇒-2x = 18

Divide both sides by -2 we get;

x = -9

Therefore, the x-intercept of the line is, (-9, 0)

I did this test too! The answer was (-9, 0)

The concert lasts 60 minutes, and the songs are all the same length. The choir sings a total of 12 songs, 2 of which are sung by the sopranos only. For how many minutes do the sopranos sing by themselves? Solve the equations using a letter for the unknown quantity.

Answers

60mins= 12x
60/12=12x/12
5=x
x= length of songs
5 x 2= 10 mins soprano sings by themselves

Answer:

10 minutes

Step-by-step explanation:

60 / 12 = 5

5 *2 = x=10

this means that x = 10

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