All categories

3 years ago

I need help with this

Mathematics

2 answers:

Katena32 [7]3 years ago

6 0

Answer:

Step-by-step explanation:

7 times 5 equal 35,

and 7 times (3+2) equals 35,

so the D equation are right.

Wittaler [7]3 years ago

3 0

Answer: D.

Step-by-step explanation:

7 x (2+3) = 7 x (3+2)

7 x (5) = 7 x (5)

35 = 35

Due to the Commutative Property of Multiplication

You might be interested in

What are the coordinates of point F?

bonufazy [111]

Answer:

Step-by-step explanation:

(4,-2.5)

7 0

3 years ago

Read 2 more answers

A person’s theoretical maximum heart rate (in heartbeats per minute) is 220 - x where x is the person’s age in years (20 ≤ x ≤ 6

Lyrx [107]

Let f(x) represents the heart beat of the person.

Now, we have been given that person’s theoretical maximum heart rate is given by 220 - x.

Also, we have been given that person strive for a heart rate that is at least 50% of the maximum. At least means greater than equal to.

Thus, we have

$f(x)\geq (220-x)0.5\\
f(x)\geq 110-0.5x$

Also, we have been given that person strive for a heart rate that is at most 75% of the maximum. At most means less than equal to.

$f(x)\leq (220-x)0.75\\
\\
f(x)\leq 165-0.75x$

Therefore, the system of inequality is given by

$f(x)\geq 110-0.5x\\
f(x)\leq 165-0.75x$

6 0

3 years ago

Assume the equation has a solution for z.<br> -cz+ 6z = tz + 83<br>z=?

solong [7]

Answer:

z = 83 / (- c + 6 - t)

Step-by-step explanation:

Given:

-cz+ 6z = tz + 83

z=?

-cz+ 6z = tz + 83

Collect like terms

-cz+ 6z - tz = 83

Factorize

z(- c + 6 - t) = 83

Divide both sides by (- c + 6 - t)

z(- c + 6 - t) / (- c + 6 - t) = 83 / (- c + 6 - t)

z = 83 / (- c + 6 - t)

5 0

3 years ago

Find the distance using the modulus of the difference between z1 = -8 + 3i and z2 = 7 - 4i. Show all work for full credit.

3241004551 [841]

Answer:

$\sqrt{274}$

Step-by-step explanation:

Given $z_1=-8+3i,\ z_2=7-4i.$

1. Find the difference $z_1-z_2:$

$z=z_1-z_2=-8+3i-(7-4i)=-8+3i-7+4i=(-8-7)+(3i+4i)=-15+7i.$

This complex number has real part $Rez=-15$ and imaginary part $Imz=7.$

2. The modulus of complex number z is

$|z|=\sqrt{Re^2z+Im^2z}=\sqrt{(-15)^2+7^2}=\sqrt{225+49}=\sqrt{274}.$

5 0

4 years ago

Read 2 more answers

Nine times a number divided by 2 equals 54.

bazaltina [42]

x = the unknown number

$\frac{9x}{2} =54$

nine <u>times</u>(multiplication) a number(x) divided(division) by 2 equals(=) 54,

so 9x is divided by 2

4 0

4 years ago