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prohojiy [21]
3 years ago
13

WILL MAKE BRAINLIEST!!

Mathematics
2 answers:
qwelly [4]3 years ago
7 0

Answer:

(a) Jun's work was correct as far as it went, but she didn't go far enough.

(b) (1, 5) and (-4, 30)

Step-by-step explanation:

y = x² + 10x – 6

y = 7x – 2

(a) Jun’s solution:

y = x² + 10x – 6

y = 7x – 2

x² + 10x – 6 = 7x – 2  

x² + 3x – 4 = 0

(x – 1)(x + 4) = 0

x = 1 or x = -4

Jun's work was correct <em>to this point</em>, but <em>she didn't go far enough</em>. She calculated the x-intercepts of the combined equation, not the values of x and y at which the two equations intersect.

Jun must calculate the value of y that corresponds to each value of x.

(b) The correct solution

Continue Jun's calculations

     y = 7x -2          y = 7x - 2

Set x = 1          Set x = -4

     y = 7 - 2          y = -28 -2

     y = 5               y = -30

The correct solutions are (1, 5) and (-4, 30).

The Figure below shows the graphs of each function with the intersection points at (1, 5) and (-4, 30).

Naddika [18.5K]3 years ago
5 0

Answer:

B. juans solution is incorrect

Step-by-step explanation:

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Mrs.Manning is making cookies for the bake sale. She jas 3/4 cup of flour and needs 1/3 cup of flour for her chocolate chip cook
Sedbober [7]

Answer:

<em>The fraction of the flour Mrs. Mannng will use for her chocolate chip cookies is 4/9</em>

Step-by-step explanation:

<u>Fraction of Portion</u>

Suppose we have a number n and another number m such as m>n. The portion or fraction of size n of m is given by the quotient n/m.

For example, 3 pieces of cake out of a total of 6 make them a fraction of 3/6 = 1/2 of the whole cake, i.e. half of the total available.

Mrs. Manning needs 1/3 cup of flour to make cookies for the bake sale. She actually has 3/4 cups of flour. Calculate the fraction of needed against the available flour:

\displaystyle \frac{\frac{1}{3}}{\frac{3}{4}}

The division can be easier performed by multiplying by the reciprocal of the denominator:

\displaystyle \frac{1}{3}\cdot \frac{4}{3}=\frac{1*4}{3*3}

\displaystyle =\frac{4}{9}

The fraction of the flour Mrs. Mannng will use for her chocolate chip cookies is 4/9

3 0
3 years ago
Simplify 1.25 (-x -4)
maw [93]

Answer:

-1.25x-5

Step-by-step explanation:

5 0
2 years ago
I need help really fast
antoniya [11.8K]

well 1+1=2 and 2+2=4 and 4+4=8 and 8+8=16 then..............................................ummm.....................................uhhhhhhhh...........................wow this is hard.......................................................................I have no clue sorry thats all i know

4 0
3 years ago
Write the equation of the line that passes through (3, 4) and (2, −1) in slope-intercept form. (2 points) a y = 3x − 7 b y = 3x
sashaice [31]

Answer: y = 5x − 11

Step-by-step explanation:

The equation of a straight line can be represented in the slope-intercept form, y = mx + c

Where c = intercept

Slope, m =change in value of y on the vertical axis / change in value of x on the horizontal axis represent

change in the value of y = y2 - y1

Change in value of x = x2 -x1

y2 = final value of y

y 1 = initial value of y

x2 = final value of x

x1 = initial value of x

The line passes through (3,4) and (2, -1),

y2 = - 1

y1 = 4

x2 = 2

x1 = 3

Slope,m = (- 1 - 4)/(2 - 3) = - 5/- 1 = 5

To determine the y intercept, we would substitute x = 3, y = 4 and m= 5 into

y = mx + c. It becomes

4 = 5 × 3 + c

4 = 15 + c

c = 4 - 15 = - 11

The equation becomes

y = 5x - 11

8 0
3 years ago
At PRMS, 25% of the 124 students Mrs. Pasternak teaches buy their lunches in the cafeteria. How many students buy their lunches
Ksju [112]
25% = 0.25
124 x 0.25 = 31

31 students bought their lunch.

Part = 31
Percent = 25%
Whole = 124

Hope this helps! ✨
6 0
3 years ago
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