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Alekssandra [29.7K]
3 years ago
15

Which is the correct simplified version of the expression -7(2x-3)

Mathematics
1 answer:
satela [25.4K]3 years ago
7 0

A. -14x+21

because -7 times 2x is -14x and -7 times -3 is 21

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Lou's Diner spent $12.80 on 8 pounds
ki77a [65]

Answer:

1lb. = $1.60

7lb. = $11.20

Step-by-step explanation:

$<u>1</u><u>2</u><u>.</u><u>8</u><u>0</u> = <u>x</u>

8 1

cross multiply

8x= $12.80

divide $12.80÷8x

x= $1.60

8 0
3 years ago
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What is the solution to the linear equation?<br> - 12+36-1=-5-b
Mariana [72]

Answer:  b=−28

Step-by-step explanation:

−12+36−1=−5−b

4 0
3 years ago
Give the parallel cross-section for the following: Cylinder, cone, sphere, and pyramid.
Maurinko [17]

The parallel cross-sections of a cylinder, cone, sphere, and pyramid are a circle, a circle, a circle, and a square.

We are given some solids. Solid geometry, or stereometry, is the traditional name for the geometry of three-dimensional Euclidean spaces in mathematics. Stereometry is concerned with measuring the volumes of various solid figures. The given solids are a cylinder, cone, sphere, and pyramid. We need to find the parallel cross-sections of the given solids. Parallel cross sections are cross sections of a solid that are parallel to each other. A cross section is a straight slice of an object. The parallel cross-sections of a cylinder, cone, sphere, and pyramid are a circle, a circle, a circle, and a square.

To learn more about cross-sections, visit :

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6 0
1 year ago
If the discriminant is negative then the quadratic has
zepelin [54]

Answer:

No <em>real</em> solutions (or has two complex roots)

Step-by-step explanation:

The discriminant, <em>b</em>² - 4<em>ac</em>, is the expression (<u><em>radicand </em></u>) of the quadratic equation:

x = \frac{-b +/- \sqrt{b^{2}-4ac} }{2a}.

The value of the discriminant determines the <u>nature</u> and the <u>number of solutions</u> given by the quadratic equation.

A discriminant with a negative value (or b² - 4ac < 0 ) means that the quadratic equation has no real solutions or two complex solutions. Quadratic equations with a negative discriminant also have no x-intercepts; thus, its graph will not cross the x-axis.  

4 0
2 years ago
What is the equation, in point-slope form, of the line that is perpendicular to the given line and passes through the point (2,
Sphinxa [80]
Ur perpendicular line will have -1 as the slope

y - y1 = m(x - x1)
slope(m) = -1
(2,5)...x1 = 2 and y1 = 5
now sub
y - 5 = -1(x - 2) can be written like : y - 5 = -(x - 2)
7 0
3 years ago
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