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Arada [10]
3 years ago
7

HELP ON A TEST Factor the expression: 4x^2 - 121 (x^2 means x squared)

Mathematics
1 answer:
GenaCL600 [577]3 years ago
8 0
(2x-11)(2x+11) is the answer
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-1 1/5 + 3/4 I’m bad with fractions and don’t know how to do these it’s due tomorrow
Dovator [93]

-1 1/5 + 3/4 = -0.45

1/5 is 0.2 in decimal form, and 3/4 is 0.75:

-1.2 + 0.75 = -0.45

Hope this helps!

8 0
3 years ago
Read 2 more answers
On a certain hot summers day, 648 people use the public swimming pool. The daily prices are $1.50 for children and $2.25 for adu
ehidna [41]

Answer:

252 children and 395 adults

Step-by-step explanation:

Make a linear system of equations, where x represents the number of children and y represents the number of adults

x+y=648

1.50x+2.25y=1269

solve using substitution, so y=648-x,

then substitute this into the second equation, so you get 1.50x+2.25(648-x)=1269,

solve for x and you will get x equals the 252

then substitute this into the first equation, so you get 252+y=648

solve and you will get y=395

3 0
3 years ago
What are the factors of 3x²+7x-20?
Leya [2.2K]
3x^2+7x-20=0\\\\a=3;\ b=7;\ c=-20\\\\\Delta=b^2-4ac\\\\x_1=\frac{-b-\sqrt\Delta}{2a};\ x_2=\frac{-b+\sqrt\Delta}{2a}\\\\\Delta=7^2-4\cdot3\cdot(-20)=49+240=289;\ \sqrt\Delta=\sqrt{289}=17\\\\x_1=\frac{-7-17}{2\cdot3}=\frac{-24}{6}=-4;\ x_2=\frac{-7+17}{2\cdot3}=\frac{10}{6}=\frac{5}{3}\\\\\\3x^2+7x-20=3(x+4)(x-\frac{5}{3})\\\\\\3x^2+7x-20=0\iff x=-4\ \vee\ x=\frac{5}{3}
4 0
3 years ago
fiona jogs every morning on a track that can be represented as a straight line. Her starting coordinates is (-2,5) and the fishi
Vaselesa [24]

We are given first coordinate (-2,5) and second coordinate (4, -5).

We need to find the coordinate of the half the distance.

Note: The mid-point coordinate is the coordinate of  half the distance.

So, we need to find the mid-point coordinate of the given coordinates.

We know mid-point formula:

Mid-point=(\frac{x1+x2}{2}, \frac{y1+y2}{2})

Plugging values of x1,y1 and x2, y2 in the above formula.

Mid-point=(\frac{-2+4}{2},\frac{5+-5}{2})

Mid-point = (\frac{2}{2},\frac{0}{2})

Mid-point = (1,0).

Therefore, (1,0) is the only coordinate of the point where fiona has run half the distance.

4 0
3 years ago
Choose an object that is about the same length as a baseball bat
grandymaker [24]
The length of the baseball bat differs in length depending on the type of tournament. The length varies from 29 to 34 inches. An example of an object with the length almost similar to these measurements is a 24 - 36 inches T-square. 
8 0
3 years ago
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