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3 years ago

Which property would you use first, in solving the equation -4/5x = -2?

Mathematics

1 answer:

kvasek [131]3 years ago

7 0

Answer:

Multiplying each side by the denominator

Step-by-step explanation:

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In a cookie recipe, for every 3 cups of flour, 2 teaspoons of vanilla is needed. How many teaspoons are needed for 5 cups of flo

Ivahew [28]

For 1 cup of flour we need 2/3 teaspoons of vanilla.
For 5 cups of flour:
5 x 2/3 = 10/3 = 3 1/3 = 3.333...
Answer:
3 1/3 teaspoons.

3 0

3 years ago

What is the perimeter of the given composite figure?

777dan777 [17]

Answer:

the answer is 73m count all and add

7 0

3 years ago

Read 2 more answers

Find the x-intercepts of the quadratic funct<br> f(x) = x2 – 5x – 14

Trava [24]

Answer:

x = - 2, x = 7

Step-by-step explanation:

To find the x- intercepts let f(x) = 0, that is

x² - 5x - 14 = 0 ← in standard form

(x - 7)(x + 2) = 0 ← in factored form

Equate each factor to zero and solve for x

x - 7 = 0 ⇒ x = 7

x + 2 = 0 ⇒ x = - 2

7 0

3 years ago

An object is launched at 28 meters per second (m/s) from a 336-meter tall platform. The equation for the object's height s at ti

kondaur [170]

Answer:343 m

Step-by-step explanation:

Given

launch velocity of object is $u=28\ m/s$

height of Platform $h=336\ m$

height of object is given by

$s(t)=-7t^2+14t+336$

For maximum height velocity of object is zero

i.e. $\frac{ds}{dt}=0$

$\frac{ds}{dt}=-14t+14+0=0$

$t=\frac{14}{14}=1\ s$

Therefore after 1 sec object achieves maximum height

$s(1)=-7(1)+14(1)+336$

$s(1)=343\ m$

3 0

4 years ago

A set of data has a normal distribution with a mean of 5.1 and a standard deviation of 0.9. Find the percent of data between 4.2

Yuliya22 [10]

A set of data has a normal distribution with a mean of 5.1 and a standard deviation of 0.9. Find the percent of data between 4.2 and 5.1.

Answer: The correct option is B) about 34%

Proof:

We have to find $P(4.2$

To find $P(4.2$ , we need to use z score formula:

When x = 4.2, we have:

$z = \frac{x-\mu}{\sigma}$

$=\frac{4.2-5.1}{0.9}=\frac{-0.9}{0.9}=-1$

When x = 5.1, we have:

$z = \frac{x-\mu}{\sigma}$

$=\frac{5.1-5.1}{0.9}=0$

Therefore, we have to find $P(-1$

Using the standard normal table, we have:

$P(-1$ = $P(z$

$=0.50-0.1587$

$=0.3413$ or 34.13%

= 34% approximately

Therefore, the percent of data between 4.2 and 5.1 is about 34%

7 0

4 years ago