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3 years ago

I need helppp!!!!!!!

Mathematics

2 answers:

Marina86 [1]3 years ago

7 0

i dont get that either lol pain. why does school have to be so hard

Otrada [13]3 years ago

7 0

I believe the answer is 1.2 !!

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Help pls!?!?!?!!! This is algebra 2

Tresset [83]

$\boxed{\sf a_n=\dfrac{(-1)^n}{5n}}$

a:-

$\\ \sf\longmapsto a_1=\dfrac{(-1)^1}{5(1)}$

$\\ \sf\longmapsto a_1=\dfrac{-1}{5}$

$\\ \sf\longmapsto a_1=-5$

b:-

$\\ \sf\longmapsto a_4=\dfrac{(-1)^4}{5(4)}$

$\\ \sf\longmapsto a_4=\dfrac{1}{20}$

c:-

$\\ \sf\longmapsto a_{30}=\dfrac{(-1)^{30}}{5(30)}$

$\\ \sf\longmapsto a_{30}=\dfrac{1}{150}$

d:-

$\\ \sf\longmapsto a_{19}=\dfrac{(-1)^{19}}{5(19)}$

$\\ \sf\longmapsto a_{19}=\dfrac{-1}{95}$

5 0

3 years ago

You need at least $635 to go on a trip to Washington, DC. You already have $75 saved for the trip. You decide to save an additio

balandron [24]

75+65w is greater than or equal to (>_) 365

4 0

3 years ago

Read 2 more answers

Heath took $40 to the mall. So far, he has purchased a baseball cap for $16.75. Write and solve an inequality to determine how m

yan [13]

40 - 16.75 = how much he has

7 0

4 years ago

Read 2 more answers

Solving 8 problems per minute, Fast Finn can finish his test in time. He was however, working faster, solving 10 problems per mi

mrs_skeptik [129]

Answer:

Number of problems = 240

Step-by-step explanation:

Let x be the number of questions and t be the time.

Given:

Average rate = 8 problems per minute

Fast Finn rate = 10 problems per minute

Fast Finn taken time = t - 6

We need to find the number of problems on the test paper.

Solution:

Average rate to solve test paper.

$Average\ rate =\frac{Number\ of\ questions}{time}$

$8 =\frac{x}{t}$

$t =\frac{x}{8}$ --------------(1)

Fast Finn rate to solve the test paper.

$Average\ rate =\frac{Number\ of\ questions}{time}$

$10 =\frac{x}{t-6}$

Using cross multiplication rule.

$x=10(t-6)$

$x=10t-60$

substitute $t =\frac{x}{8}$ from equation 1.

$x=10(\frac{x}{8}) -60$

Rearrange the equation as:

$x - \frac{5}{4}x = -60$

$\frac{4x-5x}{4}=-60$

$-\frac{x}{4} = -60$

Using cross multiplication rule.

$x = 60\times 4$

x = 240 problems.

Therefore, 240 problems were on the test.

4 0

4 years ago

Bill has a perfect cube of an unknown substance. The density of the substance is 3.0 g/cm. He

Marina CMI [18]

Answer:

9cm

Step-by-step explanation:

v=m/d

81/3=27cm^3

vol. of cube is h×a×b

since it is a cube all sides are the same

27=3h

h=9cm

6 0

3 years ago