All categories

3 years ago

I need help on math. ASAP please I am stuck on this homework problem

Mathematics

1 answer:

Papessa [141]3 years ago

3 0

Answer: white = $13, double = $14

Step-by-step explanation:

Let white chocolate chip dough = x

Let double chocolate chip dough = y

Mary: 3x + 2y = 67

Darryl: -(3x + 4y = 95)

-2y = -28

÷-2 ÷-2

y = 14

3x + 2y = 67

3x + 2(14) = 67

3x + 28 = 67

-28 -28

3x = 39

÷3 ÷3

x = 13

You might be interested in

I need help it’s due in 10 mins ASAP I’ll mark you as a brainlist please help

Lady_Fox [76]

Take DEBC a parralelogram
Parralel sides are DE and BC
THEREFORE,
1/2*(a+b)*h
1/2*(6+15)*h
1/2*(21)*h=0
10.5*h=0
h=-10.5

3 0

3 years ago

What are the zeros of f(x) = x^2 + x - 20?

kvv77 [185]

X² + x - 20
= (x+5)(x-4)

x + 5 = 0
x = -5

x - 4 = 0
x = 4

hence the answer is C

3 0

3 years ago

System of equations by substitution how do this? y= x+2 y= -4x+7

jekas [21]

Equations are given,
y= x+2

y= -4x+7

As you can see both the expressions, x+2 and -4x+7 are equal to "y". That means they are equal to each other too.

So let's equal them and solve it.

 $x+2=-4x+7\\ \\ x+2+4x=7\\ \\ x+4x+2=7\\ \\ 5x+2=7\\ \\ 5x=7-2\\ \\ 5x=5\\ \\ x=\frac { 5 }{ 5 } \\ \\ x=1$

Now we have x's value we will plug it in the first equation to find "y".

 $x=1\\ \\ y=x+2\\ \\ y=1+2\\ \\ y=3$

(1,3)

8 0

3 years ago

The speed of sound in air is a linear function of the air temperature. When the air temperature is 10°C, the speed of sound is 3

Sergeu [11.5K]

9514 1404 393

Answer:

process: substitute the given point values into the 2-point form of the equation for a line

Step-by-step explanation:

There are more than a half-dozen different forms of the equation for a line. They are useful for different purposes. One of them is the "two-point form".

Using x as the independent variable, and y as the dependent variable, the equation can be written as ...

y -y1 = (y2 -y1)/(x2 -x1)/(x -x1)

where (x1, y1) and (x2, y2) are the two points.

Here, your two points are ...

(t, s) = (10, 337) and (30, 349)

Using s in place of y, and t in place of x, these two points go into the formula like this:

s -337 = (349 -337)/(30 -10)(t -10)

Simplifying the fraction, this is ...

s -337 = (12/20)(t -10)

And writing it as a decimal, we get ...

s -337 = 0.6(t -10)

_____

Additional comments

Adding y1 to both sides of the above form gives you ...

y = (y2 -y1)/(x2 -x1)/(x -x1) +y1

This is the form I usually prefer to use, because it can lead directly to slope-intercept form. For this problem, the form shown above gets you to the answer you're looking for.

This "two-point form" is an expansion of the "point-slope form", which is ...

y - k = m(x -h) . . . . . . . line with slope m through point (h, k)

where the equation for slope is ...

m = (y2 -y1)/(x2 -x1)

and (x1, y1) is used instead of (h, k).

5 0

2 years ago

Read 2 more answers

Which of the following angles are congruent to 6? select all that apply.

sveta [45]

Answer:

which of the following angles are congruent to 6? select all that apply.

A. 1

B. 3

C. 2

D. 4

8 0

2 years ago