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3 years ago

25 - 5 x 2^2 + 1 will give brainliest!

Mathematics

2 answers:

ivolga24 [154]3 years ago

8 0

Answer:

$25\:-\:5\:\cdot \:2^2\:+\:1 = 6$

Step-by-step explanation:

$25-5\cdot \:2^2+1$

Calculate exponents $2^2 : 4$

$=25-5\cdot \:4+1$

Multiply and divide (left to right) $5\cdot \:4 : 20$

$=25-20+1$

Add and subtract (left to right) $25-20+1 : 6$

$= 6$

Hope I helped. If so, may I get brainliest and a thanks?

Thank you, have a good day! =)

GREYUIT [131]3 years ago

5 0

Answer:

-20x+26

Step-by-step explanation:

$25-5x\cdot \:2^2+1\\-2^2\cdot \:5x+26\\-20x+26$

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Rewrite the following equation in standard form. y + 2 = -8(x + 6)

crimeas [40]

Answer:

y=-8x-50

Step-by-step explanation:

Standard form or slope intercept form is y=mx+b

m=slope or (y2-y1/x2-x1) or rise/run

b= y-intercept or where the graph of the equation crosses the y-axis

So we have;

y+2=-8(x+6)

y=-8(x+6)-2

y=-8x-48-2

y=-8x-50

Any questions please feel free to ask. Thanks.

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3 years ago

Work out m and c for the line: y = 6 − x

Reika [66]

Put this into slope intercept form.

y = 6 - x becomes y = -x + 6

"m" is the coefficient on x: -1

"c" is the number without the x: 6

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3 years ago

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Helga [31]

Answer:

Step-by-step explanation:

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3 years ago

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Find the next 3 terms in the geometric sequence -36, 6, -1, 1/6, ...

timama [110]

we are given

geometric sequence -36, 6, -1, 1/6, ...

first term is -36

$a_1=-36$

now, we can find common ratio

$r=\frac{6}{-36}$

$r=-\frac{1}{6}$

now, we can find nth term

$a_n=a_1(r)^{n-1}$

now, we can plug values

and we get

$a_n=36(-\frac{1}{6})^{n-1}$

now, we can find 5th term , 6th term, 7th term

fifth term:

$a_5=36(-\frac{1}{6})^{4}$

$a_5=\frac{1}{36}$

sixth term:

$a_6=36(-\frac{1}{6})^{5}$

$a_6=-\frac{1}{216}$

seventh term:

$a_7=36(-\frac{1}{6})^{6}$

$a_7=\frac{1}{1296}$

so, next terms are

$a_5=\frac{1}{36}$ , $a_6=-\frac{1}{216}$

, $a_7=\frac{1}{1296}$ .............Answer

6 0

3 years ago

A local sorority sold hot dogs and bratwursts at the spring fling picnics. The first day they sold 8 dozen hot dogs and 13 dozen

kicyunya [14]

Answer:

1 hot dog costs $0.75

1 bratwurst costs $1.35

Step-by-step explanation:

Let x and y be the price per dozen of hot dogs and bratwursts respectively.

The first day they sold 8 dozen hot dogs and 13 dozen bratwursts for $282.60

8x + 13y = 282.60

The second day they sold 10 dozen hot dogs and 15 dozen bratwursts for a total of $333.00

10x + 15y = 333

and we have the linear system

8x + 13y = 282.60

10x + 15y = 333

which can be written in matrix form as

$\bf \left(\begin{array}{cc}8&13\\10&15\end{array}\right)\left(\begin{array}{c}x\\ y\end{array}\right)=\left(\begin{array}{c}282.60\\333\end{array}\right)$

The solution would be given by

$\bf \left(\begin{array}{c}x\\ y\end{array}\right)=\left(\begin{array}{cc}8&13\\10&15\end{array}\right)^{-1}\left(\begin{array}{c}282.60\\333\end{array}\right)$

We have

$\bf \left(\begin{array}{cc}8&13\\10&15\end{array}\right)^{-1}=\left(\begin{array}{cc}-3/2&13/10\\1&-4/5\end{array}\right)$

hence

$\bf \left(\begin{array}{c}x\\ y\end{array}\right)=\left(\begin{array}{cc}-3/2&13/10\\1&-4/5\end{array}\right)\left(\begin{array}{c}282.60\\333\end{array}\right)=\left(\begin{array}{c}9\\ 16.2\end{array}\right)$

Now,

if a dozen hot dogs cost $9, 1 hot dog costs 9/12 = $0.75

if a dozen bratwursts cost $16.2, 1 bratwurst costs 16.2/12 = $1.35

4 0

3 years ago