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labwork [276]
3 years ago
6

alex has a 48 mile trail first half of the time he was biking twice as fast as the second half of the time if he spent 4 hours o

n the road how fast was he biking at first
Mathematics
1 answer:
Irina-Kira [14]3 years ago
4 0

Answer:

16 mph

Step-by-step explanation:

Givens:

4 hours total time

48 miles total distance

So our equation should look like this.

48 = 2x(2) + x(2)

Where x = speed second half of trip.

x = 8

x*2 = 16 mph

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Today, you earn a salary of $28,000. what will be your annual salary twelve years from now if you earn annual raises of 2.6 perc
Debora [2.8K]
Salary after 12 years = $28,000(1+0.026)^12 =$38100.12
8 0
3 years ago
A triangle has a base of 15 feet and a height of 9 feet. What is the area of the triangle? Label the figure. Write the formula,
bazaltina [42]

Answer:

135...................

8 0
3 years ago
What is 4,7,12,19,28 in quadratic form
Naddik [55]
Asked and answered elsewhere.
brainly.com/question/9247314

You obviously don't mind using "technology" (Brainly) to answer these questions. A graphing calculator can do quadratic regression on the sequence and tell you its formula.

If you want to do it by hand, you can write the equation
.. y = ax^2 +bx +c
and substitute three of the given points. Then solve the resulting three linear equations for a, b, and c.
.. 4 = a +b +c
.. 7 = 4a +2b +c
.. 12 = 9a +3b +c

Subtracting the first equation from the other two reduces this to
.. 3 = 3a +b
.. 8 = 8a +2b
The latter can be divided by 2, so reduces to
.. 4 = 4a +b
Subtracting the first of the reduced equations from this, you have
.. 1 = a
so
.. 3 = 3*1 +b
.. 0 = b
and
.. 4 = a + b + c = 1 + 0 + c
.. 3 = c

And your equation is
.. y = x^2 +3 . . . . . . as shown previously

7 0
3 years ago
Determine the number of possible triangles, ABC, that can be formed given A = 30°, a = 4, and b = 10.
sweet [91]

Answer:

None

Step-by-step explanation:

We are given a triangle ABC with ∠A = 30°, sides a = 4 and b = 10.

According to the 'Law of Sines- Ambiguous Case', we have,

If a < b×sinA, then no triangle is possible.

If a = b×sinA, only one triangle is possible

If a > b×sinA, two triangles are possible.

So, we have,

b×sinA = 10 × sin30 = 10 × 0.5 = 5.

Now, as

4 = a < bsinA = 5.

We get, according to the rule, no triangle is possible.

4 0
3 years ago
Read 2 more answers
Which expression is equivalent to 5(4k+7)?<br><br> A. 5(7+4k)<br> B.7(5k+4)<br> C.35k+20<br> D.4k+35
Nata [24]

Answer:

A. 5(7+4k) = 35+ 20k

This is the same as 5(4k+7)

20k+35 is equal to 35+20k

5 0
3 years ago
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