All categories

3 years ago

This app is amazing! Please help I’m really confused!

Mathematics

2 answers:

RideAnS [48]3 years ago

7 0

The answer to the question

Alex777 [14]3 years ago

3 0

Answer:

7(x+3)

Step-by-step explanation:

7x+21

7x = 7*x

21 = 7*3

We can factor out a 7 from both terms. What remains is what is inside the parentheses

7(x+3)

You might be interested in

Twin brothers, Billy and Bobby, can mow their grandparent's lawn together in 53 minutes. Billy could mow the lawn by himself

podryga [215]

5353 minutes = 89.22 hours
Maybe the figures should be 53 and 20??

Let's let Billy = A
The formula to use for work problems is
Time = (A*B) / (A+B)

53 = ( (A +20)* A) / (A +20 + A) )
53 = ( A^2 + 20A ) / (2A + 20)
A^2 + 20A -106A -1060
A^2 -86A -1060
A = 96.935
Bobby Mows in 116.935 minutes

3 0

3 years ago

What is the answer to. Write a polynomial equation with integer coefficients that has the given roots, x=7 and x=-5

rewona [7]

$\bf \begin{cases}
x=7\implies &x-7=0\\
x=-5\implies &x+5=0
\end{cases}\implies (x-7)(x+5)=\stackrel{original}{polynomial}
\\\\\\
x^2-2x-35=y\implies 1x^2-2x-35=y$

7 0

3 years ago

What is the measure of angle c?

nikitadnepr [17]

Answer:

c = 127°

Step-by-step explanation:

∡c and ∡a are supplementary angles.

Supplementary angles sum 180°

∡a = 53°

Then:

53° + c = 180°

c = 180° - 53°

c = 127°

7 0

1 year ago

Please Help Me! I will give all my point to who ever answers my question!!!

love history [14]

Step-by-step explanation:

The equation that is given is only for the specific place of that object. To find the velocity, you need to take the derivative of the equation. This will give you:

$V=2+\frac{1}{2} t$

Now, to find the average velocity of this object, plug in the values given to you. It's between the time interval [1, 2] so these are the two numbers you'll plug into the velocity equation. Finding this average is like finding any other average.

$V(1)=2+\frac{1}{2} (1)\\V(1)=2+\frac{1}{2}=\frac{5}{2}\\V(2)=2+\frac{1}{2}(2)\\V(2)=2+1=3$

$V_{avg}=\frac{3-\frac{5}{2} }{2-1} \\V_{avg}=\frac{\frac{6}{2}-\frac{5}{2} }{1} \\V_{avg}=\frac{1}{2}$

Average velocity is 0.5 sec

To find instantaneous velocity just find the velocity at time one. Think about the name "instantaneous velocity," it's the velocity in that <u>instant</u>.

We already found this, so I don't need more work (it's displayed above).

The instantaneous velocity when $t=1$ is 2.5 sec.

3 0

3 years ago

Please help me! i linked the image that has the question

ycow [4]

Answer:

Step-by-step explanation:

The area of a trapezoid is the average of the parallel bases times the height.

A=h(a+b)/2 and since we have two identical trapezoids the total are will be

A=h(a+b) in this case

A=15(32+25)=855mm^2

7 0

3 years ago