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3 years ago

−6x+2x−5+2: simplified

Mathematics

1 answer:

Anestetic [448]3 years ago

3 0

Answer:

-4x-3

Step-by-step explanation:

all you do is combine like terms: -6x+2x=-4x and -5+2=-3

so the answer would be -4x-3

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The cost of four scarfs and six hats is $52. The cost of two hats is $1 more than the cost of one scarf. What are the costs of o

timurjin [86]

Four scarves and six hats is $52.00
4s+6h=52 

two hats is $1.00 more than the cost of one scarf. 
2h=1s+1 
2h=s+1 
s=2h-1 

substitute for s 
4s+6h=52 
4(2h-1)+6h=52 
8h-4+6h=52 
14h=56 
h=4 

s=2h-1 
s=8-1 
s=7 

a scarf cost $7 
a hat cost $4

8 0

4 years ago

Read 2 more answers

Find the value of r so the line that passes through (-5,2) and (3,r) has a slope of -1/2

soldier1979 [14.2K]

The value of r so the line that passes through (-5,2) and (3,r) has a slope of -1/2 is -2

Solution:

Given that line is passing through point (-5, 2) and (3, r)

Slope of the line is $\frac{-1}{2}$

Need to determine value of r.

Slope of a line passing through point $\left(x_{1}, y_{1}\right) \text { and }\left(x_{2}, y_{2}\right)$ is given by following formula:

$\text { Slope } m=\frac{y_{2}-y_{1}}{x_{2}-x_{1}}$ --- eqn 1

$\text { In our case } x_{1}=-5, y_{1}=2, x_{2}=3, y_{2}=\mathrm{r} \text { and } m=-\frac{1}{2}$

On substituting the given value in (1) we get

$\begin{array}{l}{-\frac{1}{2}=\frac{r-2}{3-(-5)}} \\\\ {\text { Solving the above expression to get value of } r} \\\\ {=>-\frac{1}{2}=\frac{r-2}{3+5}} \\\\ {=>-8=\frac{r-2}{3+5}} \\\\ {=>-8=2(r-2)} \\\\ {=>-8=2 r-4} \\\\ {=>2 r=-8+4} \\\\ {=>2 r=-4} \\\\ {=>r=\frac{-4}{2}=-2}\end{array}$

Hence the value of "r" is -2

8 0

4 years ago

Hello, a quick question which number is least to greatest 0.359, 0.35, 1

Aleksandr-060686 [28]

Answer:

0.35, 0.359, 1

Step-by-step explanation:

0.359 = 359 thousandths

0.35 = 0.350 = 350 thousandths

1 = 1.000 = 1000 thousandths

Since 350 < 359 < 1000, then from least to greatest you get

0.35, 0.359, 1

6 0

4 years ago

The temperature at 9 a.m. is 2 degrees. The temperature rises 3 more degrees by noon. Which expression describes the temperature

Archy [21]

Answer:5

Step-by-step explanation:

2+3

5 0

3 years ago

According to a human modeling project, the distribution of foot lengths of 16- to 17-year-old boys is approximately Normal wi

anygoal [31]

The percentage of boys 16- to 17-years-old who wear a size 11 shoe or larger is 3.59%.

Step-by-step explanation:

Step 1: Sketch the curve.

The probability that X>27.9 is equal to the blue area under the curve.

Step 2:

Since μ=25.2 and σ=1.5 we have:

P ( X > 27.9 ) = P ( X−μ > 27.9−25.2 )

⇒ P ( X−μ/σ > 27.9−25.2/1.5)

Since Z=x−μσ and 27.9−25.21.5=1.8 we have:

P ( X>27.9 )=P ( Z>1.8 )

Step 3: Use the standard normal table to conclude that:

P (Z>1.8)=0.0359

Percentage = $0.0359(100) = 3.59$ %

Therefore , The percentage of boys 16- to 17-years-old who wear a size 11 shoe or larger is 3.59%.

6 0

3 years ago