All categories

3 years ago

Sketch the graph of 4x² + 25x – 21 = y using your graphing calculator. What are the x-intercepts of this graph

Mathematics

1 answer:

denis-greek [22]3 years ago

3 0

Answer:

B .75 - 7

Step-by-step explanation:

You might be interested in

3. 2x – y = -7 4x – y = -4 A) (-1.5, 4) B) (1.5, 10) C) (4, -1.5) D) (-1.5, -2)

marishachu [46]

Multiply first equaton by -1 and add to first

-2x+y=7
4x-y=-4 +
2x+0y=3

2x=3
divide 2
x=3/2

sub
2x-y=-7
2(3/2)-y=-7
3-y=-7
minus 3
-y=-10
negative 1 times both sides
y=10

(3/2,10)
(1.5,10)

B is ansre

7 0

3 years ago

Identify 2 pairs of angles of the given type. plsss HELP!!!!!!

shtirl [24]

Answer:

It is (2,4) Plz mark brainliest

Step-by-step explanation:

8 0

3 years ago

Last time, one out of every 4 students in our class was absent. This time, after Jen came back, only one out of every 5 students

VMariaS [17]

Answer: There are 20 students and 4 students are not here today.

Step-by-step explanation:

If the number of students = 4

Let the number of students be 'x'.

Fraction of students absent = $\dfrac{x}{4}$

If the number of students = 5

Fraction of students absent = $\dfrac{x}{5}$

And Jen came back,

So, the fraction of student absent is also written as

$\dfrac{x}{4}-1$

According to question, it becomes,

$\dfrac{x}{5}=\dfrac{x}{4}-1\\\\\dfrac{x}{5}=\dfrac{x-4}{4}\\\\4x=5(x-4)\\\\4x=5x-20\\\\4x-5x=-20\\\\-x=-20\\\\x=20$

Hence, there are 20 students in our school.

And number of students are not here today is $\dfrac{20}{5}=4$

3 0

3 years ago

I will mark you brainliest!

kari74 [83]

Answer:

F(x) < 0 over the intervals (-∞, -0.7) and (0.76, 2.5).

Step-by-step explanation:

The line is below the x-axis at those intervals

7 0

3 years ago

What is -5(-2) equal to

PtichkaEL [24]

Step-by-step explanation:

I think this should be the answer

3 0

3 years ago

Read 2 more answers