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3 years ago

I need the value of x. 10x + 4 - 2x = 6x + 9 + 7

Mathematics

2 answers:

erastova [34]3 years ago

3 0

Answer:

x = 6

Step-by-step explanation:

nydimaria [60]3 years ago

3 0

Answer:

x=6

Step-by-step explanation:

Step 1: Simplify both sides of the equation.

10x+4−2x=6x+9+7

10x+4+−2x=6x+9+7

(10x+−2x)+(4)=(6x)+(9+7)(Combine Like Terms)

8x+4=6x+16

Step 2: Subtract 6x from both sides.

8x+4−6x=6x+16−6x

2x+4=16

Step 3: Subtract 4 from both sides.

2x+4−4=16−4

2x=12

Step 4: Divide both sides by 2.

2x=12

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kendrey ran 9 miles in 1 hour and 30 minutes. how long will it take her to run 12 miles at this pace?

castortr0y [4]

Turn hours into minutes

1hr = 60mins

Add the 60mins with 30mins since it’s 1hr and 30 mins. Which will equal 90mins

9miles/ 90minutes

You can simplify
1 mile/ 10 mins
So for 1 mile it takes 10 mins

And the problem is asking how much will it take for her to run 12 miles

Meaning it will take 120 minutes for her to run 12 miles.

6 0

3 years ago

A point P(x,y) moves along the graph of the equation y = x3 + x2 + 2. The x-values are changing at the rate of 2 units per secon

CaHeK987 [17]

Using implicit differentiation, it is found that y is changing at a rate of 10 units per second.

---------------------

The equation is:

$y = x^3 + x^2 + 2$

Applying implicit differentiation in function of t, we have that:

$\frac{dy}{dt} = 3x^2\frac{dx}{dt} + 2x\frac{dx}{dt}$

x-values changing at a rate of 2 units per second means that $\frac{dx}{dt} = 2$
Point Q(1,4) means that $x = 1, y = 4$ .

We want to find $\frac{dy}{dt}$ , thus:

$\frac{dy}{dt} = 3x^2\frac{dx}{dt} + 2x\frac{dx}{dt}$

$\frac{dy}{dt} = 3(1)^2(2) + 2(1)(2) = 6 + 4 = 10$

y is changing at a rate of 10 units per second.

A similar problem is given at brainly.com/question/9543179

5 0

2 years ago

Order these numbers from least to greatest.<br> 2.9, 2.207, 3.76, 2.27

Lelu [443]

Answer:

From least to greatest, the order would go: 2.207, 2.27, 2.9, 3.76.

Step-by-step explanation:

To find the least greatest number, we have to look at each digit. In this number sequence, the least greatest number is a 2 for the single digit. With those 2s, 2.2 is the lowest out of them. And out of the 2.2s, the 2.207 is smaller than the 2.27. The 2.27 is the next number, then the 2.9 and then the 3.76.

Hope this helps! :)

7 0

3 years ago

Read 2 more answers

The local bakery applies a 155% markup on all baked goods. If it costs them $3.50 to make a batch of cookies, at what price do t

natka813 [3]

The price charged for the batch of cookies is $8.925

Step-by-step explanation:

Marked price refers to the price at which an establishment offers to sale a product. For-profits to occur, marked price is always more than cost price (cost of producing the item)

Here the local bakery has marked up the price by 155%. This means that the local bakery has increased the marked price by 155% above the cost price accrued to them.

The cost price of the cookies= $ 3.5

Hence the increased marked price= (155/100) *3.5

Increased marked price= $ 5.425

Hence the charge customers need to pay for the cookies= increased marked price + cost price

Charge = $5.425+ $3.5= $8.925

the price charged for the batch of cookies is $8.925

6 0

2 years ago

Which expression is equivalent to 3 7/8-6 1/4

Serhud [2]

get a common denominator which is 24

3 7/8 = 3 21/24

6 /4 = 6 6 /24

3 21/24 - 6 6 /24

big number minus small number take sign of larger

6 6/24

- 3 21/24

-------------

5 30/24

3 21/24

--------------

2 9/24

2 3/8

the sign of the larger is negative

-2 3/8

7 0

3 years ago