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3 years ago

Need help with this math don’t understand

Mathematics

1 answer:

slava [35]3 years ago

3 0

Answer:

Step-by-step explanation:

The formula for flipping smth over the x axis is(x,y)→(x,−y)

just flip the symbol on the second #

your points are:

(-4,-2)→(-4,2)

(0,-4)→(0,4)

(-4,-5)→(-4,5)

Once you graph it, youll see that the shapes are congruent, just flipped, therefore the answer is A

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A batter strikes a baseball. the equation y = -0.005^2 +0.7x + 3.5 models its path, where x is the horizontal distance, in feet,

hram777 [196]

Answer:

(D)144.8 feet

Step-by-step explanation:

Given the equation which models the path of the baseball

$y = -0.005x^2 +0.7x + 3.5$

where x is the horizontal distance, in feet, the ball travels and y is the height, in feet, of the ball.

To determine how far from the batter the ball will land, we determine the distance x at which the height, y=0.

$y = -0.005x^2 +0.7x + 3.5=0$

$-0.005x^2 +0.7x + 3.5=0$

We use the quadratic formula to solve.

In the quadratic equation above, a=-0.005, b=0.7, c=3.5

$x=\dfrac{-b\pm\sqrt{b^2-4ac} }{2a} \\=\dfrac{-0.7\pm\sqrt{0.7^2-4(-0.005*3.5)} }{2*-0.005} \\=\dfrac{-0.7\pm\sqrt{0.49+0.07} }{-0.01}\\=\dfrac{-0.7\pm\sqrt{0.56} }{-0.01}\\x=\dfrac{-0.7+\sqrt{0.56} }{-0.01} \: or\: x=\dfrac{-0.7-\sqrt{0.56} }{-0.01}\\x=-4.83 \: or\: x=144.83$

Since x cannot be negative, x=144.8 feet to the nearest tenth of a foot.

<u>The correct option is D.</u>

6 0

3 years ago

Pleaseee I really need help as soon as possible!!!!

Rashid [163]

Think of a strategy that works out best for you.

5 0

3 years ago

What kind of questions do biologists attempt to answer?

Thepotemich [5.8K]

Answer: D.

Biologists attempt to answer questions about the living world.

Step-by-step explanation:

A biologist is a scientist devoted to and producing results in biology through the study of life. Therefor, Biologists would usually attempt to answer questions about the living world.

* Hopefully this helps:) Mark me the brainliest:)!!

4 0

3 years ago

Use Euclid’s algorithm to find the greatest common factor of the following pairs of numbers:

Black_prince [1.1K]

Answer:

The GCF (12, 78) is 6 and GCF (18, 176) is 2.

Step-by-step explanation:

Step 1:

The greatest common factor of the number is defined as the factor of two or more numbers. The acronym of Greatest common factor is GCF.

(a)

GCF (12, 78)

The greatest common factor of the two numbers 12 and 78 is calculated by Euclid’s algorithm as follows:

$78=12\times6+6$

$12=6\times2+0$

Therefore, the greatest common factor GCF is 6.

Step 2:

(b)

GCF (18, 176)

The greatest common factor of the two numbers 18 and 176 is calculated by Euclid’s algorithm as follows:

$176=18\times9+14$

$18=14\times1+4$

$14=4\times3+2$

$4=2\times2+0$

Therefore, the greatest common factor GCF is 2.

6 0

3 years ago

Divide 2/8 by 9/18 . Input your answer as a reduced fraction.\

Katen [24]

$\large\displaystyle\text{$\begin{gathered}\sf \boldsymbol{\sf{\frac{2}{8}\div\frac{9}{18} }} \end{gathered}$}$

$\large\displaystyle\text{$\begin{gathered}\sf Simplify \ \frac{2}{8} \ to \ \frac{1}{4}. \end{gathered}$}$

$\large\displaystyle\text{$\begin{gathered}\sf \boldsymbol{\sf{\frac{1}{4}\div\frac{18}{9} }} \end{gathered}$}$

$\large\displaystyle\text{$\begin{gathered}\sf Use \ this \ rule: a\div \frac{b}{c}=a\times \frac{c}{b}a \end{gathered}$}$

$\large\displaystyle\text{$\begin{gathered}\sf \boldsymbol{\sf{\frac{1}{4}\times\frac{18}{9} }} \end{gathered}$}$

$\large\displaystyle\text{$\begin{gathered}\sf Use \ this \ rule: \frac{a}{b} \times \frac{c}d{}=\frac{ac}{bd}. \end{gathered}$}$

$\large\displaystyle\text{$\begin{gathered}\sf \boldsymbol{\sf{\frac{1\times18}{4\times9} \ \to \ \ Multiply }} \end{gathered}$}$

$\large\displaystyle\text{$\begin{gathered}\sf \boldsymbol{\sf{ \frac{18}{36}= }}\boxed{\large\displaystyle\text{$\begin{gathered}\sf \boldsymbol{\sf{\frac{1}{2} }} \end{gathered}$}} \end{gathered}$}$

8 0

2 years ago

Read 2 more answers