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3 years ago

A=1/7(b+c-d) solve for b

Mathematics

1 answer:

castortr0y [4]3 years ago

8 0

Step-by-step explanation:

ax7=7 x 1/7(b+c-d)

7a=b+c-d

7a-c+d=b

b=7a-c+d

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Samira used the calculator to find 254.3 × 2.5. Which statement best describes her work? Samira is correct. Samira is incorrect.

alekssr [168]

Answer:

A samira is correct

Step-by-step explanation:

Because she did her own expression right, now she has to solve

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3 years ago

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Image of parabola with a maximum value at (1, 9), y-intercept at (0, 8) and x-intercepts at (2, 0) and (4, 0).

natka813 [3]

Answer:

(a) 4 seconds

Step-by-step explanation:

The given point (4, 0) on the parabola tells you the answer to the question: the coin was in the air 4 seconds before its height is 0. It is no longer in the air at that point.

<em>Additional comment</em>

In order to match the rest of the problem statement, the first given x-intercept must be (-2, 0).

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2 years ago

One number is 8 greater than another. The product of the numbers is 84. Find the numbers.

mario62 [17]

Let x,y be the two numbers.

Given that one number is 8 greater than another.

Let x be the smaller number ans y be the greater number.

That is y=x+8. Let this be the first equation.

And also given that product of the two numbers is 84.

That is x × y = 84, let us plugin y=x+8 here.

x × (x+8) = 84

x²+ 8x -84 = 0.

x²+12x-4x-84 = 0

x(x+12)-4(x+12) =0

(x-4)(x+12)=0

That is x= 4 or -12.

Hence two positive numbers corresponding to given conditions are 4,12.

And two negative numbers corresponding to given conditions are -12,-4.

Step-by-step explanation:

hope it may help you!!

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3 years ago

Reflection across y=x

alexdok [17]

C= (-2,3) B=(-3,0) D=(-3,4) would be the reflection across the axis

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3 years ago

A rectangle has length represented as (R +5) and width represented as (R + 2).

svetlana [45]

Answer:

4(R + 5 + R + 2) [Option B]

Step-by-step explanation:

<u>GIVEN :-</u>

Length = R + 5
Width = R + 2

Perimeter of the rectangle

<u>FORMULAE TO BE USED :-</u>

For a rectangle with length 'l' and width 'w' , its perimeter = 4(l + w)

<u>SOLUTION :-</u>

Perimeter = $4(R + 5 + R+2)$

= $4(2R + 7)$

= $8R + 14$

7 0

2 years ago