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4 years ago

Please help me with this math problems

Mathematics

1 answer:

Dahasolnce [82]4 years ago

8 0

The answer is -2x^2-7x-11
you just have to add the ones that have the same variable with the same exponent. so you would add -5x^2 and 3x^2 which is -2x^2.
Then you add -3x and -4x which is -7x.
in the end you only have to add -8 and -3 which is -11

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Write the expression (4x-2)•6(2x+ 7) in the ax2+bx+c What are the values of the coefficient

tresset_1 [31]

The values of the coefficient are ax^2+bx+c=

48x^2-24x+84 and A= 48, B=-24, C=84.

(4x-2)•6(2x+7)=

6•2x+ 6•7

(4x-2)(12x+42)=

4x•12x= 48x^2 4x•42= 168.

-2•12x= -24x -2•42=-84

48x^2-24x+168-84=

48x^2-24x+84=

A= 48, B=-24, C=84

ax^2+bx+c= 48x^2-24x+84.

3 0

3 years ago

A hot air balloon is flying at a constant speed of 20 mi/h at a bearing of N 36° E. There is a 10mi/h crosswind blowing due east

crimeas [40]

Answer:

Step-by-step explanation:

v = {[(20sin36°)i + (20cos36°)j] + 10i} mi/h

vE = 20sin36º + 10 = 21.76 mi/h

vN = 20cos36° = 16.18 mi/h

v = √(vE2 + vN2) = √(21.762 + 16.182) mi/h = 27.12 mi/h

θ = tan-1(vN/vE) = tan-1(16.18/21.76) = 36.6º north of east

3 0

3 years ago

Identify the property used in Step 3.

svp [43]

The associative property has been used in step 3

Step-by-step explanation:

There are multiple properties that are used to solve the equations

One of them is associative property.

Associative property states that the order of three terms which are being added doesn't matter the result will be same.

$a + (b+c) = (a+b)+c$

In step 2:

$2 + 2x + 10 + (-10 + 11x)$

As we can see that the last three terms are being added

The solver has used the associative property to solve the expression.

$2 + 2x + [10 + (-10)] + 11x$

The brackets have been changed from $10+(-10+11x)\ to\ [10 + (-10)} +11x$ using associative property

The associative property has been used in step 3

Keywords: Properties , expressions

Learn more about expressions at:

#LearnwithBrainly

5 0

4 years ago

four boxes to be mailed are weighed at the post office. box A weighs 8.25 pounds box B weighs 8.2 pounds box C weighs 8.225 poun

attashe74 [19]

Box A : 8.25
Box B : 8.2
Box C : 8.225
Box D : 8.05

heaviest box is box A

6 0

3 years ago

Read 2 more answers

8x=4x−32<br><br> what is the answer? please help me

Rus_ich [418]

Answer: x= -8

Step-by-step explanation:

8x-4x = -32

x(8-4) = -32

x(4) = -32

4x = -32

x = -32/4

x = -8

8(-8) = 4(-8) - 32

-64 = -32 - 32

-64 = -64

6 0

3 years ago