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Elodia [21]
3 years ago
6

Help with question 1 and 2 (I starred them so you know)

Mathematics
2 answers:
MakcuM [25]3 years ago
7 0
<span>2)

A= l*w
A=(l+3)*w
A= 130
try it
l= 13 CM
w=10 CM
13*10=130
13*10=130</span>
tigry1 [53]3 years ago
4 0
I can help you only with  #2.

Area= l*w
Area=(l+3)*w
Area= 130
Let's try 10 and 13.
Is the length 3 greater than its width? YES
Does it multiply to 130? YES

LENGTH= 13 CM
WIDTH=10 CM

cHECK=
13*10=130

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Fill in the missing number. 40% of blank = 800
fredd [130]

Answer: 2000

Step-by-step explanation:

4 0
3 years ago
Solve the formula I=Prt to find the principal, P, when I=$121.10, r=2.8%, and t=5 years.
Akimi4 [234]

Answer:

<h2>P = $865</h2><h2 />

Step-by-step explanation:

I=Prt

when I=$121.10,

r=2.8%,

t=5 years.

I=Prt

find: P

plugin values into the equation:

121.10 = P (0.028) 5

P =<u> 121.10 </u>

  0.028 (5)

P = $865

7 0
4 years ago
The scatter plot shows data for the size of television screens from the years 2007-2016. how might the equation for the line of
Nikitich [7]
First the y-intercept would increase.  The magnitude of the slope of the trendline would decrease as compared to the slope with all the years in them.  The slope would still be increasing.  And there would still be a positive correlation.
4 0
4 years ago
a parking meter contains $8.25 in dimes and quarters. after emptying the meter, the worker counts 51 coins. how many quarters an
Marianna [84]
<h3>30 dimes and 21 quarters are present</h3>

<em><u>Solution:</u></em>

Let "d" be the number of dimes

Let "q" be the number of quarters

1 dime = $ 0.10

1 quarter = $ 0.25

The worker counts 51 coins

Therefore,

d + q = 51

d = 51 - q ---------- eqn 1

<em><u>A parking meter contains $8.25 in dimes and quarters</u></em>

Therefore,

0.10d + 0.25q = 8.25 -------- eqn 2

<em><u>Substitute eqn 1 in eqn 2</u></em>

0.10(51 - q) + 0.25q = 8.25

5.1 - 0.10q + 0.25q = 8.25

0.15q = 3.15

Divide both sides by 0.15

<h3>q = 21</h3>

Substitute q = 21 in eqn 1

d = 51 - 21

<h3>d = 30</h3>

Thus 30 dimes and 21 quarters are present

8 0
3 years ago
Find the inverse of the given function
xenn [34]

For this case, we must find the inverse of the following function:

f (x) = \frac {5x + 1} {- x + 7}\\x\neq 7

To find the inverse we follow the steps below:

y = \frac {5x + 1} {- x + 7}

We rewrite the denominator:

y = \frac {5x + 1} {- (x-7)}\\y = - \frac {5x + 1} {(x-7)}

We exchange variables:

x = - \frac{5y + 1} {(y-7)}

We solve for y:

We multiply on both sides of the equation by (y-7)

x (y-7) = - 5y-1\\xy-7x = -5y-1

We subtract xy on both sides of the equation:

-7x = -5y-1-xy

We add 1 to both sides:

-7x + 1 = -5y-xy

We factor for y:

-7x + 1 = y (-5-x)

We divide both sides by (-5-x):

y = \frac {-7x + 1} {- 5-x}

So, we have:

f ^ {- 1} (x) = \frac {-7x + 1} {- 5-x}

Answer:

f ^ {- 1} (x) = \frac {-7x + 1} {- 5-x}

x\neq -5

3 0
4 years ago
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