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3 years ago

-1/2 x -1/7 I do not understand how to do this

Mathematics

2 answers:

Firdavs [7]3 years ago

8 0

Answer:

sss

Step-by-step explanation:

Kobotan [32]3 years ago

6 0

Answer:

$\dfrac{1}{14}$

Step-by-step explanation:

1. You are multiplying two negative numbers. Negative times negative is positive, so the answer is positive.

2. To multiply two fractions, multiply together the numerators and multiply together the denominators.

$-\dfrac{1}{2} \times -\dfrac{1}{7} =$

$= \dfrac{1 \times 1}{2 \times 7}$

$= \dfrac{1}{14}$

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A car braked with a constant deceleration of 16ft/s2, producing skid marks measuring 200 feet before coming to a stop. How fast

Llana [10]

Answer:the car was traveling at a speed of 80 ft/s when the brakes were first applied.

Step-by-step explanation:

The car braked with a constant deceleration of 16ft/s^2. This is a negative acceleration. Therefore,

a = - 16ft/s^2

While decelerating, the car produced skid marks measuring 200 feet before coming to a stop.

This means that it travelled a distance,

s = 200 feet

We want to determine how fast the car was traveling (in ft/s) when the brakes were first applied. This is the car's initial velocity, u.

Since the car came to a stop, its final velocity, v = 0

Applying Newton's equation of motion,

v^2 = u^2 + 2as

0 = u^2 - 2 × 16 × 200

u^2 = 6400

u = √6400

u = 80 ft/s

7 0

2 years ago

Graph the line with slope -3 passing through the point (5,0)

Ghella [55]

Y-y1= m(x-x1) point-slope form
y-0= -3(x-5)
solve this point-slope form to slope-intercept form. Use the information to graph the line.

4 0

3 years ago

Please help with math question

Naddik [55]

1- Solution using graphs:
Take a look at the attached images.
The red graph represents the first given function while the blue graph represents the second given function.
We can note that the two graphs are the same line (they overlap).
This means that any chosen point on one of them will satisfy the other.
This means that there are infinite number of solutions to these two equations.

2- Solution using substitution:
The first given equation is:
y = -5x + 3 ...........> equation I
The second given equation is:
2y + 10x = 6 ...........> equation II

Substitute with I in II and solve as follows:
2(-5x+3) + 10x = 6
-10x + 6 + 10x = 6
0 = 0
This means that there are infinitely many solutions to the given system of equations.

Hope this helps :)

3 0

2 years ago

What is the answer please help

maria [59]

Answer:

Step-by-step explanation:

x^2=24^2+7^2

=576+49

=625

x=25

8 0

3 years ago

What is the sum or difference of 5/7 - 1/3

Hatshy [7]

ANSWER: 8/21

Step:
1. Find the GCF (Greatest Common Factor)
The two denominator which is the bottom number have to be the same ALWAYS when adding and subtracting the fraction. So to find the GCF, you keep multiplying until you see the same number, only use the bottom number to find the GCF
7: 7, 14, 21, 28
3: 3, 6, 9, 12, 15, 18, 21, 24, 27
GCF= 21

2. 5/7 -1/3
Multiple both to get 21
5/7 x 3/3 = 15/21
1/3 x 7/7 = 7/21

3. Sove
15/21 - 7/21
= 8/21

7 0

2 years ago