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3 years ago

Please help me, i will give brainiest !!

Mathematics

2 answers:

BARSIC [14]3 years ago

8 0

Answer:

If Cora runs 1/2 mile per week and x is the number of weeks, then she will run 5+1/2x. Then determine how many weeks are in two and a half months (depends on which month it is as there are less weeks in February than in January!) but we could estimate 6.

For Hana, you will have 3+ 3/4 x

Step-by-step explanation:

First equation is y=5+1/2 x and then plug 6 in for x to solve for y. the second equation is y=3+3/4x and plug in 6.

svet-max [94.6K]3 years ago

3 0

Answer:

If Cora runs 1/2 mile per week and x is the number of weeks, then she will run 5+1/2x.

Step-by-step explanation:

basically this explains the context of the problem

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Suppose you invest $75 a month in an annuity that earns 48% APR compounded monthly. How much money will you have in this account

il63 [147K]

Answer:

The money after 3 years is $5819.8735

Step-by-step explanation:

We are given

monthly payment =$75

so, P=75

annuity that earns 48% APR

so, r=48%

Since, it is compounded monthly

so,

$i=\frac{48}{12} =4$ %

i=0.04

$n=12\times 3=36$

now, we can use annuity formula

$FV=P[\frac{(1+i)^n-1}{i} ]$

where

FV is future value

now, we can plug values

$FV=75[\frac{(1+0.04)^{36}-1}{0.04} ]$

we get

$FV=5819.8735$

The money after 3 years is $5819.8735

4 0

3 years ago

Determine the discriminant for the given equation x^2+4x+5=0. Then describe the roots(how many and what type).

Fed [463]

Discriminant = b^2 - 4ac, where a, b and c come from the form of the quadratic equation as ax^2 + bx + c

Discriminant = (4)^2 - 4(1)(5)
= 16 - 20
= -4

-4 < 0, therefor there are no roots

(If the discriminant = 0, then there is one root
If the discriminant > 0, there are two roots, and if it is a perfect square (eg. 4, 9, 16, etc.) then there are two rational roots
If the discriminant < 0, there are no roots)

3 0

4 years ago

Simplify 4^2 • 4^8

pantera1 [17]

Answer:

$4^{10}$