All categories

3 years ago

Which of the graphs below represents the equation 4x+y=7?

Mathematics

1 answer:

Goryan [66]3 years ago

4 0

Graphs number 2 or c

You might be interested in

If one of the roots of the equation x² – 4x + k = 0 exceeds the other by 2, then find the roots and determine the value of k.

Verizon [17]

Step-by-step explanation:

the solutions for a quadratic equation is

x = (-b ± sqrt(b² - 4ac))/(2a)

in our case

a = 1

b = -4

c = k

x = (4 ± sqrt(16 - 4k))/2 = 2 ± sqrt(4 - k)

x1 = 2 + sqrt(4 - k)

x2 = 2 - sqrt (4 - k)

x1 = 2 + x2

2 + sqrt(4 - k) = 2 + 2 - sqrt(4 - k)

2×sqrt(4 - k) = 2

sqrt(4 - k) = 1

4 - k = 1

k = 4 - 1 = 3

x1 = 3

x2 = 1

3 0

3 years ago

Read 2 more answers

½ x - 12 = 9 please help im not smart

frosja888 [35]

Answer:

Step-by-step explanation:

I'm pretty sure that this is the answer.

4 0

3 years ago

Terrance and Jesse are training for a long-distance race. Terrance trains at a rate of 6 miles every half hour, and Jesse trains

AnnyKZ [126]

I set up fractions based on quarter hours. I hope this helps.

8 0

3 years ago

A cyclist rides in a circle with speed 5 m/s. What is his centripetal

Anna71 [15]

Option A

The centripetal acceleration is 1.32 $ms^{-2}$

Solution:

From given question,

A cyclist rides in a circle with speed 5 m/s

The circle has a radius of 19 m

To find: Centripetal acceleration

The formula for Centripetal acceleration is given as:

$a_c = \frac{v^2}{r}$

Where,

$a_c$ = centripetal acceleration

r is the radius and v is the velocity

From given statement,

radius = r = 19 m

velocity = v = 5 m/s

Substituting the values in above formula, we get

$a_c = \frac{5^2}{19}\\\\a_c = \frac{25}{19}\\\\a_c = 1.315 \approx 1.32$

Thus centripetal acceleration is 1.32 $ms^{-2}$

6 0

3 years ago

The distance from Portland to Seaside is 75 miles what is the distance in inches on the map which scale of 1.25 in:25 mi

jek_recluse [69]

Answer:

1.25in/25mi = x/75mi

25x = 93.75

x = 3.75

3.75 inches

5 0

3 years ago