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3 years ago

Please help solve this. t = -3. r = 4t^2 + 5

Mathematics

1 answer:

Andrei [34K]3 years ago

7 0

Answer:

Step-by-step explanation:

replace the t with -3:-

r = 4(-3)^2 + 5

= 36 + 5

= 41

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Evaluate x - 20 when x=3

ryzh [129]

Answer:

-17

Step-by-step explanation:

Plug in 3:

3 - 20 =

Solve:

3-20 = -17

5 0

3 years ago

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Three fifths of the members of a hiking club went on the last hiking trip. If 39 people went on the trip , how many are in the c

finlep [7]

Step-by-step explanation:

1. Since 39 is 3/5 of the club, divide by 3 to get 1/5 of the club

2. 1/5 of the club is 13 people

3. Multiply 13 by 5 to get 5/5 of the club (which is the whole club)

4. The whole club is 65 people

5. You can check it because 65×3/5=39

4 0

3 years ago

Please need help asap!!

worty [1.4K]

A property of rectangles is that opposite sides are congruent. In this case, since QT and RS are opposite sides, they are equal to each other. With this knowledge, you can form the equation $50=4x+8$ to solve for x.

Firstly, subtract both sides by 8: $42=4x$

Next, divide both sides by 4 and your answer will be $10.5=x$ , or the third option.

6 0

3 years ago

The function f(x)=g(x), where f(x)=2x-5 and g(x)=x^2-6. The table below shows the process of solving using successive approximat

valkas [14]

Answer:

The positive solution is 2.4.

Step-by-step explanation:

The given functions are

$f(x)=2x-5$

$g(x)=x^2-6$

It is given that

$f(x)=g(x)$

$2x-5=x^2-6$

$0=x^2-6-2x+5$

$0=x^2-2x-1$

The quadratic formula:

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

$x=\frac{2\pm \sqrt{(2)^2-4(1)(-1)}}{2(1)}$

$x=\frac{2\pm \sqrt{8}}{2}$

$x=\frac{2\pm 2\sqrt{2}}{2}$

$x=\frac{2(1\pm \sqrt{2})}{2}$

$x=1\pm \sqrt{2}$

$x=2.4,-0.4$

Therefore the positive solution is 2.4.

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3 years ago

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How many solutions are there to the equation below 8x + 11 = 8x + 8

Nataly [62]

8x + 11= 8x + 8

8x - 8x = 8 - 11

0 = - 3 False

No solutions.

Answer is B.0.

8 0

3 years ago

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