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telo118 [61]
2 years ago
13

Find the solutions to the equation below.

Mathematics
1 answer:
Artist 52 [7]2 years ago
8 0

Answer:

A and B.

Step-by-step explanation:

4x^2 - 4x - 3 = 0    

4x^2 + 2x - 6x - 3 = 0

2x(2x + 1) - 3(2x + 1) = 0

(2x - 3)(2x + 1) = 0

x = 3/2, -1/2.

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For his statistics project, Martin recorded the weights of some apples.
nikdorinn [45]

Answer:

50 grams

Step-by-step explanation:

You simply subtract 70 from 120, and get 50.

4 0
2 years ago
A guy-wire is attached to a pole for support. If the angle of elevation to the pole is 67° and the wire is attached to the groun
vovangra [49]
You have to go at this in a round-about fashion...by finding the length of the leg across from the 67 degree angle.  This is found by using the tangent ratio...Tan(67)=x/137; x=137tan(67) = 322.8. Now you can use this in one of two ways: use Pythagorean's Theorem to find the length of the hypotenuse OR you could use the sin67=322.8/x.  Up to you. Either way, make sure you have your calculator in degree mode!
4 0
3 years ago
480 = 3,000 x R x 2. What is R?
7nadin3 [17]

Answer:

R= 0.08 i think

Step-by-step explanation:

3 0
3 years ago
Read 2 more answers
How to convert 2/3 to a decimal?
V125BC [204]
Divide the numerator (2) by the denominator (3) to convert it to a decimal
6 0
2 years ago
LMNP is a parallelogram.
Amanda [17]

A rectangle is a parallelogram with four right angles.

That's why in order to prove that LMNP is rectangle you have to show that LP is perpendicular to PN.

Solution:

The coordinates of vertices are L(-4,1), P(-3,-1) and N(3,2), then

\overrightarrow{PL}=(-4-(-3),1-(-1))=(-1,2),\\ \overrightarrow{PN}=(3-(-3),2-(-1))=(6,3).

Find the dot product:

\overrightarrow{PL}\cdot \overrightarrow{PN}=-1\cdot 6+2\cdot 3=-6+6=0.

Since the dot product of two vectors is equal to zero, these vectors are perpendicular.

LMNP is a parallelogarm, then

m\angle P=m\angle M=90^{\circ},\\ m\angle L=m\angle N=180^{\circ}-90^{\circ}=90^{\circ}.

You show that all angles are right, this means that parallelogram LMNP is a rectangle.

Answer: correct choice is D.

6 0
3 years ago
Read 2 more answers
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