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choli [55]
2 years ago
6

2x(z+4)+1-z+xy; x=4, y=2, z=-3

Mathematics
2 answers:
Marina CMI [18]2 years ago
6 0

Answer:

=20

Step-by-step explanation:

in pic

(hope this helps can I pls have brainlist (crown) ☺️)

Arte-miy333 [17]2 years ago
5 0

\huge\text{Hey there!}

<h2>\large\textsf{2x(z + 4) + 1 - z + xy}</h2><h2>\large\text{= 2(4)(-3 + 4) + 1 - (-3) + 4(2)}</h2><h2>\large\text{= 8(1) + 1 - (-3) + 4(2)}</h2><h2>\large\text{= 8 + 1 - (-3) + 4(2)}</h2><h2>\large\text{= 9 - (-3) + 4(2)}</h2><h2>\large\text{= 12 + 4(2)}</h2><h2>\large\text{= 12 + 8}</h2><h2>\large\text{= 20}</h2><h2 /><h3>\large\boxed{\textsf{Therefore, your answer is: \rm{20}}}\huge\checkmark</h3><h3>\mathsf{Good \ luck  \ on \ your \ assignment \ and \ enjoy \  your \ day!}</h3><h3 /><h3>\frak{Amphitrite1040:)}</h3>

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Question 7: Solve this system<br><br> A.(15, 10)<br> B.(-15, 10)<br> C.(-10, 25)<br> D.(10, 15)
Alexandra [31]

Answer:

D. (10, 15)

Step-by-step explanation:

Hi there!

We are given the following system:

\frac{1}{2}x+y=20

x+4y=70

And we want to solve it (find the values of x and y).

Let's use substitution for this problem, where we will isolate one variable on one side, while the other side contains an expression with the other variable. Then, we use the expression to solve for the variable that the expression contains, then use the value of that variable to solve for the aforementioned isolated variable.

Subtract \frac{1}{2}x from both sides in the first equation

y=20-\frac{1}{2}x

Now substitute 20-\frac{1}{2}x as y in x+4y=70

x+4(20-\frac{1}{2}x)=70

Do the distributive property

x+80-2x=70

Combine like terms on the left

-x+80=70

Subtract 80 from both sides

-x=-10

Multiply both sides by -1

x=10

We found the value of x. Now let's use that value to find what y is

Since we know that y=20-\frac{1}{2}x and x=10, we can substitute 10 as the value of x to solve for y

In that case,

y=20-\frac{1}{2}(10)

Multiply

y=20-5

Subtract

y=15

The answer is x=10, y=15, or as a point, <u>(10, 15), aka D</u>

Hope this helps!

4 0
3 years ago
Answer this please with steps
Ahat [919]

hdhsjsjsbisksjjsklslsjs

5 0
3 years ago
How many minutes are in the time interval from 7:09 a.m. to 10:36 a.m.
USPshnik [31]
7.09 AM - 10.36 AM

In-between these two times, there are 3 hours and 27 minutes.

This calculates to 207 minutes.
4 0
3 years ago
When Rahul began 7th grade, he put his savings of $3,000 in an account that compounded interest annually. He hoped to have $6,00
DENIUS [597]

Answer:

12%

Step-by-step explanation:

You are going to want to use a modified compound interest formula, as shown below. This version of the compound interest formula is what you use to solve for the interest rate.

r=n[(\frac{A}{P})^{1/nt}-1]

r = interest rate (decimal)

n = numbers of times compounded (annually)

A = total amount

P = principal amount

<em>t = time (years)</em>

Now, lets plug in the values:

r=1[(\frac{6,000}{3,000})^{1/(1)(6)}-1]

r=.12246

Next, multiply <em>r </em>by 100 to get our answer:

.12246(100)= 12.246

The last step is to round our answer to the nearest whole number:

12.246 -> 12

7 0
3 years ago
Which is a higher score 3 out of 10 or 5 out of 20?
velikii [3]
3 out of 10......3/10 = 0.3 = 30%
5 out of 20 .....5/20 = 0.25 = 25%

higher score is 3 out of 10
3 0
3 years ago
Read 2 more answers
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