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3 years ago

HELP this is the 7th time i post this!!!!!!!!!!!!!!!!!!!!

Mathematics

2 answers:

Deffense [45]3 years ago

4 0

What the person above me said

Dominik [7]3 years ago

3 0

Answer:

(2x-7)+ (-7)

Step-by-step explanation:

sum: 2x-7 + -2x

-7

an equivalent expression would be 3x-7-3x, or anything else that simplifies to -7

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Math math pls help pls

lord [1]

Answer:

30/5 than simplyply it to 6 0/5

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3 years ago

BRAINLIST AND 50 POINST ANSWER 5-8

Nastasia [14]

Answer:

1. 64

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3 years ago

How to find matrics M

makkiz [27]

$\left[\begin{array}{ccc}9&7\\-4&2\end{array}\right] -4M=\left[\begin{array}{ccc}-3&3\\4&-18\end{array}\right]\qquad(*) \\\\M=\left[\begin{array}{ccc}a&b\\c&d\end{array}\right]\to4M=\left[\begin{array}{ccc}4a&4b\\4c&4d\end{array}\right]$

$(*)\qquad\left[\begin{array}{ccc}9&7\\-4&2\end{array}\right] -\left[\begin{array}{ccc}4a&4b\\4c&4d\end{array}\right]=\left[\begin{array}{ccc}-3&3\\4&-18\end{array}\right]\\\\\left[\begin{array}{ccc}9-4a&7-4b\\-4-4c&2-4d\end{array}\right]=\left[\begin{array}{ccc}-3&3\\4&-18\end{array}\right]\\.\qquad\qquad\qquad\qquad\ \ \ \Downarrow\\(_{11})\qquad9-4a=-3\ \ \ |-9\\-4a=-12\ \ \ \ |:(-4)\\a=3\\\\(_{12})\qquad7-4b=3\ \ \ \ |-7\\-4b=-4\ \ \ \ |:(-4)\\b=1$

$(_{21})\qquad-4-4c=4\ \ \ \ |+4\\-4c=8\ \ \ \ |:(-4)\\c=-2\\\\(_{22})\qquad2-4d=-18\ \ \ \ |-2\\-4d=-20\ \ \ \ \ |:(-4)\\d=5\\\\Answer:\ A.\ M=\left[\begin{array}{ccc}3&1\\-2&5\end{array}\right]$

3 0

3 years ago

The discount price of a hat is $18. What is the regular price?

Mumz [18]

Without that value, we can't solve your problem, unless you are looking for an algebraic equation.

6 0

3 years ago

HELPLSPLSPLPSLPSLPSL

babunello [35]

Answer:

25.5

Step-by-step explanation:

first find the area od the rectangle than the triangle.

to find the area count the number of squares and use A=b*h

than do the same for the triangle using A=.5*b*h

15=3*5

10.5=.5*3*7

10.5+15=25.5

3 0

3 years ago