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3 years ago

Which of the following are mathematical sentences? Check all that apply.

Mathematics

2 answers:

Paraphin [41]3 years ago

5 0

A, C, E

any mathematical expression that then includes an equal sign becomes a sentence or equation

Paraphin [41]3 years ago

5 0

Answer: A. 4 - d = 8

C. 3 + 2 = 5

E. 1 < 2

Step-by-step explanation:

A mathematical sentence makes by combining two expressions with a comparison operator (+,-,×,÷) to create a fact that it may be either true or false.

A. 4 - d = 8

It is a mathematical statement which says that the difference between 4 and d is 8.

B. 4 - v

It is not a mathematical statement because it is neither true nor false. It is just a variable expression.

C. 3 + 2 = 5

It is a mathematical statement which is true.

D. 6

It is not a mathematical statement because it is neither true nor false.

E. 1 < 2

It is not a mathematical statement which is false. It is just a numerical expression.

F. 5g

It is not a mathematical statement because it is neither true nor false.It is just a variable expression.

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The old price for school lunches is $4. The new

insens350 [35]

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Use this equation :

(difference/original) x 100

Substitute the values in:

(0.32/4) x 100

Solve :

increase = 8 %

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7 0

2 years ago

A quadrilateral is graphed in the coordinate plane below. Which classification best describes the quadrilateral (parallelogram,

Ahat [919]

Answer:

Trapezoid

Step-by-step explanation:

Given quadrilateral has vertices at points A(-2,-1), B(3,13), C(15,5) and D(13,-11).

Find slopes of lines AD and BC:

$\text{Slope}_{AD}=\dfrac{y_D-y_A}{x_D-x_A}=\dfrac{-11-(-1)}{13-(-2)}=\dfrac{-11+1}{13+2}=\dfrac{-10}{15}=-\dfrac{2}{3}\\ \\\text{Slope}_{BC}=\dfrac{y_C-y_B}{x_C-x_B}=\dfrac{5-13}{15-3}=\dfrac{-8}{12}=-\dfrac{2}{3}$

Since the slopes are the same, lines AD and BC are parallel.

Find slopes of lines ABD and CD:

$\text{Slope}_{AB}=\dfrac{y_B-y_A}{x_B-x_A}=\dfrac{13-(-1)}{3-(-2)}=\dfrac{14}{5}\\ \\\text{Slope}_{CD}=\dfrac{y_D-y_C}{x_D-x_C}=\dfrac{-11-5}{13-15}=\dfrac{-16}{-2}=8$

Since the slopes are different, lines AB and CD are not parallel.

This means quadrilateral ABCD is trapezoid (two opposite sides - parallel and two another opposite sides - not parallel)

7 0

3 years ago

Write the number in standard form. 7 x 107

laila [671]

Answer:

749

Step-by-step explanation:

Break apart the equation:

(7 x 100) + (7 x 7)

7 x 100 = 700

7 x 7 =49

700 + 49 = 749

Hope this helps

3 0

2 years ago

Solve the simultaneous equations -x + 4y = 12 x + y = - 7

blondinia [14]

Answer:

y = 1, x = - 8

(-8, 1)

Step-by-step explanation:

-x + 4y = 12

x + y = -7

add the equations together

0x + 5y = 5

5y = 5

y = 1

substitute y for 1 in one of the original equations to find x

x + y = -7

x + 1 = -7

x + 1 - 1 = - 7 - 1

x = - 7 - 1

x = -8

7 0

2 years ago

WILL GIVE BRAINLIEST!!!!! Mariah cuts a rectangle along its diagonal. Two congruent triangles are created. The two angles create

pogonyaev

Answer:

Stated Below:

Step-by-step explanation:

x + y = 90 because the 2 angles add up to 90 .

Now, m < x = five times m < y, so x = 5y or y = x/5

So the last choice is the correct one.

7 0

2 years ago