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2 years ago

Can someone please help me?

Mathematics

1 answer:

Flauer [41]2 years ago

7 0

C) You have to subtract3x from x yielding -2x.

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25 times 55 wright it out please

lakkis [162]

Answer:

1375

Step-by-step explanation:

25*55= 1375

6 0

2 years ago

What is the solution of the equation?-10 + sqrt x+8 = -4

pantera1 [17]

$D:x+8\geq0\to x\geq-8\\\\-10+\sqrt{x+8}=-4\ \ \ /+10\\\\\sqrt{x+8}=-4+10\\\\\sqrt{x+8}=6\iff x+8=36\\\\x=36-8\\\\x=28\in D$

6 0

2 years ago

The area of a rectangle is 6 + 3x square feet. Which of the following expressions could represent the lengths

Setler79 [48]

Answer:

Step-by-step explanation:

3(2+x)

distribute

=6+3x

8 0

2 years ago

Read 2 more answers

The amount of time Ricardo spends brushing his teeth follows a Normal distribution with unknown mean and standard deviation. Ric

Papessa [141]

Let $X$ denote the number of minutes spent brushing his teeth, and let $\mu$ be the mean and $\sigma$ the standard deviation for this distribution.

$\mathbb P(X$

The z-score corresponding to this probability is approximately $z=-0.2533$ , which means

$\dfrac{1-\mu}\sigma=-0.2533\iff\mu-0.2533\sigma=1$

Next, (note the sign change)

$\mathbb P(X>2)=0.02\implies\mathbb P(X\le2)=\mathbb P\left(\dfrac{X-\mu}\sigma\le\dfrac{2-\mu}\sigma\right)=0.98$

The corresponding z-score is approximately $z=2.0538$ , so you have

$\dfrac{2-\mu}\sigma=2.0538\iff\mu+2.0538\sigma=2$

Solving the two equations for $\mu$ and $\sigma$ , you'll find that the mean is approximately $\mu=1.1098$ and the standard deviation is approximately $\sigma=0.4334$ .

7 0

2 years ago

an artist is using tiles and boards for a project. A tile has length 2/3 ft and width 2/3 ft. A board has length 1/2 yd and widt

Margaret [11]

Answer:

4 : 9

Step-by-step explanation:

The requested ratio is ...

tile length : board length = (2/3 ft) : (1/2 yd) = (8 in) : (18 in)

= 8 : 18 = 4 : 9

_____

To make a unitless ratio, both parts must have the same units. Here, we chose to express the lengths in inches. We could have used feet or yards as well. (2/3 ft)×(1 yard)/(3 ft) = 2/9 yd or (1/2 yd)(3 ft/yd) = 3/2 ft. You get the same ratio with any of these:

(2/9 yd) : (1/2 yd) = (4 yd) : (9 yd) = 4 : 9 . . . . . multiply by 18

(2/3 ft) : (3/2 ft) = (4 ft) : (9 ft) = 4 : 9 . . . . . multiply by 6

5 0

2 years ago