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3 years ago

Please answer the problem

Mathematics

2 answers:

Damm [24]3 years ago

8 0

Answer:

The second works better because:

577-479= 577-(477+2)= 577-477-2=100-2=98

Step-by-step explanation:

kirill115 [55]3 years ago

5 0

Answer:

Mental math works better.

Step-by-step explanation:

Mental math.

Counting on the number line is more open to error.

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A race car travels at a speed of 230 miles per hour. The race track on which the car is competing is 400 miles long. About how l

olga nikolaevna [1]

To solve for this we will be using the formula S = D/T

S = Speed
D = Distance
T = Time

First we need to re-arrange this formula to solve for time

T= D/S

T = 400/230

T=1.74 hours

.74 hours is close enough to .75 that we can say it is 45 minutes

So it is 1 hour and 45 minutes

7 0

3 years ago

Read 2 more answers

I need to figure out how many solutions does the system of equations below have.

Aleonysh [2.5K]

Answer:

The system has one solution.

Step-by-step explanation:

To find the number of solutions of the system, we equal both equations for y.

If we have ax = b, in which both a and b are different of 0, we have one solution.

If both a and b are 0, we have infinite solutions.

If a is 0 and b is not, there are no solutions.

y=6/7x-8 and y=7/9x+10/9

$\frac{6x}{7} - 8 = \frac{7x}{9} + \frac{10}{9}$

$\frac{6x}{7} - \frac{7x}{9} = \frac{10}{9} + 8$

$\frac{54x - 49x}{63} = \frac{10}{9} + \frac{72}{9}$

$\frac{5x}{63} = \frac{82}{9}$

$45x = 63*82$

Both a and b are different of 0, so the system has one solution.

6 0

3 years ago

I need your help guys please can you answer for me please

dybincka [34]

1. In parallelograms, opposite sides are congruent. Therefore EV=16
2. In parallelograms, adjacent angles add up to 180°, so measure of angle V = 100°
3. Opposite angles are equal so measure of angle L = 95°
4. Diagonals of parallelograms bisect each other. DE=10
5. Same rule as #4. LV=18

7 0

2 years ago

Let f(x) = 5x + 4 and g(a) = a2 − 4a + 4 2 . Find the function value. g(−2)

natta225 [31]

Answer: 54

Step-by-step explanation:

replace "a" with "-2" in the g-equation

g(a) = a² - 4a + 42

g(-2) = (-2)² - 4(-2) + 42

= 4 + 8 + 42

= 54

7 0