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Svetllana [295]
3 years ago
10

3. Select all the expressions that are equivalent to - 3/4(32+24e-4f)

Mathematics
1 answer:
Ierofanga [76]3 years ago
4 0

Answer:

Second box

Third box

fifth box

Step-by-step explanation:

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if alpha and beta are the roots of the equation 2 x square - 7 x - 3 is equal to 0 find alpha + beta​
Lorico [155]

Answer:

Values for alpha and beta are 0.5 and 3.

Step-by-step explanation:

2x² - 7x - 3 = 0

2x² - 7x - 3 = (2x - 1 )(x - 3)

∴ (2x - 1 )(x - 3) = 0

The only way to get zero by multiplying two values together, is if one of those values is qual to zero. Therefore, either (2x - 1 )=0, or (x - 3)=0.

If (2x - 1 )=0

∴2x=1

∴x=0.5

If (x - 3)=0

∴x=3

We have two values for x. These values represent alpha and beta.

<em>(BTW - I'm not sure from the phrasing of your question whether or not you just want to find the values or whether you want to find the sum of the values (I don't know if you used '+' to mean 'and' or 'plus'), but if you do want to find the sum, it's of course just 0.5+3= 3.5.)</em>

8 0
3 years ago
At the start of the week, you could run for 8 minutes. By the end of the week, you could run for 15 minutes. Which proportion co
pantera1 [17]

Answer:

See below.

Step-by-step explanation:

Increase = 15 - 8 = 7 minutes.

Percent increase = 7/8 * 100.

4 0
4 years ago
Read 2 more answers
A new neighborhood activity complex is being built in madison. the perimeter of the rectangular playing field is 268 yards. the
motikmotik

Answer:

the width is 47 yards

the length is 87 yards

Step-by-step explanation:

Given

the perimeter of the rectangular playing field is 268

perimeter of rectangle is given by 2* ( length + width)

hence for given rectangular playing field

268 =  2* ( length + width)  __________________equation A

Let the width of field be W

length is seven less than  double the width

Width is W then double the width will be 2*W

then 7 yards less than the double the width will be 2*W - 7

Therefore length of field in terms of W is 2*W - 7

Now substituting value of length with  2*W - 7  and

width with W in equation A, we have given below expression

268 =  2* ( 2*W - 7  + W)

=> 268/2 = 3W - 7

=> 134 = 3W - 7

=> 3W = 134 + 7 = 141

=> W = 141/3 = 47

Therefore width of  rectangular playing field is 47 yards

Length of  rectangular playing field = 2W - 7 = 2*47 - 7 = 94 - 7

Length of  rectangular playing field = 87

Therefore Length of  rectangular playing field is 87 yards

4 0
3 years ago
Can someone help me step by step find the value of x??
Anettt [7]
Okay all triangles add up to 180 degrees. So subtract 38 from 180 and since the other angles are congruent divide by two. X=71

3 0
4 years ago
A car travels on a straight road with a velocity of 25km/hour in first one hour and in the
Novay_Z [31]

The Average Velocity (A.V) of car

is 8.33m/s .

This is a Right answer...

4 0
3 years ago
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