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3 years ago

Solve The Equation, Check Your Answer 15=7x+1-5x

2 answers:

5 0

15=7x+1-5x

Put like terms together. ( group anything alike)

15+1=16

7x-5x=2x

16 2x
—- ——-
2x 2x

2x/2x cancels itself out.

16 divided by 2 is 8

x=8

I hope this helped!

LUCKY_DIMON [66]3 years ago

5 0

15=7x+1-5x

Subtract 5x from 7x

15=2x+1

Subtract 1 from 15

14=2x

Divide 2 on both sides

Final Answer: x=7

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Leah is creating satin bows for a wedding. From a 15-meter-long ribbon, she first cuts a piece meters long. Then she cuts a piec

GrogVix [38]

This question is incomplete

Complete Question

Leah is creating satin bows for a wedding. From a 15-meter-long ribbon, she first cuts a piece 3 4/9 meters long. Then she cuts a piece 6 5/9 meters long from the remaining ribbon. How much ribbon does Leah have left?

A.) -12 meters

B.) -5 meters

C.) 5 meters

D.) 12 meters

Answer:

C.) 5 meters

Step-by-step explanation:

From a 15-meter-long ribbon, she first cuts a piece 3 4/9 meters long. Then she cuts a piece 6 5/9 meters long from the remaining ribbon.

Step 1

3 4/9 meters + 6 5/9 meters

Least Common Denominator = 9

(3+ 6) + [ 4/9 + 5/9)

9 + [4 + 5/9]

9 + [9/9]

9 + 1

= 10 meters

This means, the total number of ribbons cut is 10 meters

The amount of ribbon Leah has left =

Initial length of ribbon - Amount of ribbon cut

= 15 meters - 10 meters

= 5 meters

Hence, Leah has 5 meters long of ribbon left

8 0

3 years ago

We draw a random sample of size 25 from a normal population with variance 2.4. If the sample mean is 12.5, what is a 99% confide

Helen [10]

Answer:

Step-by-step explanation:

Confidence interval for the population mean is expressed by the formula;

CI = xbar ± Z(S/√n) where;

xbar is the sample mean = 12.5

Z is the z score at 99% confidence = 2.576

S is the standard deviation = √variance

S = √2.4 = 1.5492

n is the sample size = 25

Substituting the given values into the formula given above,

CI = 12.5 ± 2.576(1.5492/√25)

CI = 12.5 ± 2.576(0.30984)

CI = 12.5 ± 0.7981

CI = (12.5-0.7981, 12.5+0.7981)

CI = (11.2019, 12.7981)

Hence the 99% confidence interval for the population mean is 11.2≤ $\mu$ 12.8 (to 1 decimal place)

7 0

4 years ago

3 10/15 - 1 12/15 what is difference

Montano1993 [528]

Answer:

28/15

Step-by-step explanation:

Convert the mixed numbers to improper fractions, then find the LCD and combine.

3 0

3 years ago

Nancy planted 77 daisies 48 roses and 39 tulips about how many roses and tulips did she plant

Svetach [21]

The question says "about" so we will be rounding the numbers.

48 roses = 50 roses
39 tulips = 40

50 + 40 = 90. So she planted about 90 tulips and roses

6 0

3 years ago

Read 2 more answers

Solve for x

maw [93]

Step-by-step explanation:

$\tt{ \frac{x}{2} - \frac{x}{5} = 2}$

Take the L.C.M of 2 & 5. It's ' 10 '. Firstly find out the factors of 2 [ i.e 1 × 2 ] and then secondly find out the factors of 5 [ i.e 1 × 5 ]. Now , Note that while finding L.C.M of any numbers, Common numbers & Remaining numbers must be multiplied. In our case , common number = 1 & Remaining numbers are 2 & 5. Multiply them : [ 1 × 2 × 5 = 10 ].

⟶ $\tt{ \frac{x \times 5 - x \times 2}{10} = 2}$