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3 years ago

Ms. Clark had 135 cookies. She sold x amount of cookies at the local

Mathematics

1 answer:

Mekhanik [1.2K]3 years ago

7 0

Answer:

135-x=c

Step-by-step explanation:

135 is what she has, when you subtract (x) which is what she sold, it should give you the amount she has left (c)

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What is the sum of areas of the faces on a rectangular prism called

stepladder [879]

Answer:

The surface area of the rectangular prism.

Step-by-step explanation:

The formula for the surface area of a rectangular prism is SA = 2 (wl + hl + hw), which actually represents the areas of each of the faces.

SA = 2wl + 2hl + 2hw

We see that the SA is the sum of the areas of the faces on a rectangular prism. Look at a picture of a rectangular prism if you have trouble understanding this.

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3 years ago

The coordinates of a point on a coordinate grid are (?1, 5). The point is reflected across the x-axis to obtain a new point. The

4vir4ik [10]

D. (?1, ?5) because it is only reflected across the x-axis, so it only effects the Y coordinates.

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3 years ago

How much can 0.75 go into 4.5

Nutka1998 [239]

Answer:

6 times

Step-by-step explanation:

well just divide 4.5 by 0.75 to get

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2 years ago

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PLs help 50 PTS!!!!! PLEASE ILL GIVE BRAINLIEST!!!!!

Nookie1986 [14]

Answer:

$\large\boxed{y=\dfrac{1}{4}x^2-x-4}$

Step-by-step explanation:

The equation of a parabola in vertex form:

$y=a(x-h)^2+k$

(h, k) - vertex

The focus is

$\left(h,\ k+\dfrac{1}{4a}\right)$

We have the vertex (2, -5) and the focus (2, -4).

Calculate the value of a using $k+\dfrac{1}{4a}$

k = -5

$-5+\dfrac{1}{4a}=-4$ add 5 to both sides

$\dfrac{1}{4a}=1$ multiply both sides by 4

$4\!\!\!\!\diagup^1\cdot\dfrac{1}{4\!\!\!\!\diagup_1a}=4$

$\dfrac{1}{a}=4\to a=\dfrac{1}{4}$

Substitute

$a=\dfrac{1}{4},\ h=2,\ k=-5$

to the vertex form of an equation of a parabola:

$y=\dfrac{1}{4}(x-2)^2-5$

The standard form:

$y=ax^2+bx+c$

Convert using

$(a-b)^2=a^2-2ab+b^2$

$y=\dfrac{1}{4}(x^2-2(x)(2)+2^2)-5\\\\y=\dfrac{1}{4}(x^2-4x+4)-5$

use the distributive property: a(b+c)=ab+ac

$y=\left(\dfrac{1}{4}\right)(x^2)+\left(\dfrac{1}{4}\right)(-4x)+\left(\dfrac{1}{4}\right)(4)-5\\\\y=\dfrac{1}{4}x^2-x+1-5\\\\y=\dfrac{1}{4}x^2-x-4$

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3 years ago

rafeal counted a total of 40 white cars and yellow cars. there were 9 times as many white cars as yellow cars. how many white ca

liberstina [14]

360 is the anwer because i multipled 40 white cars by 9 times yellow car to get answer 40×9=360

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3 years ago

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