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Karo-lina-s [1.5K]

3 years ago

7

Evaluate this expression what is b=-6 and c=7.c-7b

1 answer:

VLD [36.1K]3 years ago

7 0

Answer:

49

Step-by-step explanation:

substitute b = - 6 and c = 7 into the expression and evaluate

c - 7b = 7 - (7 × - 6) = 7 - (- 42) = 7 + 42 = 49

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straws are sold in packs and boxes there are 25 straws in each pack there are 48 straws in each box tricia buys p packs of straw

Burka [1]

Answer:

I think the equation would be 25p + 48b = # of Straws

Step-by-step explanation:

8 0

3 years ago

Help please I need 5 points total. i need 2 to left of vertex. i need vertex. i need 2 to right of vertex. Please, quickly, I am

zlopas [31]

We are given with a quadratic equation which represents a Parabola , we need to find the vertex of the parabola , But let's recall that , For any quadratic equation of the form ax² + bx + c = 0 , the vertex of the parabola is given by ;

${\quad \qquad \boxed{\bf{Vertex = \left(\dfrac{-b}{2a},\dfrac{-D}{4a}\right)}}}$

Where , D = b² - 4ac (Discriminant)

Now , On comparing the given equation with ax² + bx + c , we have

⇢⇢⇢ <em><u>a = 1 , b = - 10 , c = 2</u></em><em><u>7</u></em>

Now , Calculating D ;

${:\implies \quad \sf D=(-10)^{2}-4\times 1\times 27}$

${:\implies \quad \sf D=100-108}$

${:\implies \quad \bf \therefore \quad D=-8}$

Now , Calculating the vertex ;

${:\implies \quad \sf Vertex =\bigg\{\dfrac{-(-10)}{2\times 1},\dfrac{-(-8)}{4\times 1}\bigg\}}$

${:\implies \quad \sf Vertex = \left(\dfrac{10}{2},\dfrac{8}{2}\right)}$

${:\implies \quad \bf \therefore \quad Vertex = (5,2)}$

Hence , The vertex of the parabola is at (5,2)

Note :- As the Discriminant < 0 . So , the equation will have imaginary roots .

Refer to the attachment for the graph as well .

5 0

3 years ago

PLEASE HELP ASAP!!! I NEED CORRECT ANSWERS ONLY PLEASE!!!

Nady [450]

Yo sup??

We have to apply trigonometry ie cosine formula

cos44=RS/RQ

RS=RQ*cos44

=7.2

Hope this helps

4 0

3 years ago

What is h?<br> Problem 23h=12

Grace [21]

Answer:

h= $\frac{12}{23}$

h=0.52173913043

Step-by-step explanation:

23h=12

divide 12 by 23

h= $\frac{12}{23}$

h=0.52173913043

Hope this helps! :)

7 0

3 years ago

Read 2 more answers

A line with a slope of 1 passes through the point (1,8) what is the equation in slope intercept form

zubka84 [21]

Answer:

Step-by-step explanation:

Slope m = 1

Point (1;8)

x1 = 1 and y1 = 8

y - y1 = m(x - x1)

y - 8 = 1(x - 1)

y - 8 = x - 1

y = x - 1 + 8

y = x + 7

3 0

4 years ago