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irga5000 [103]
3 years ago
5

5 (3z-3) =30 it’s from delta math 8 grade

Mathematics
2 answers:
gulaghasi [49]3 years ago
5 0

5 (3z-3) = 30

15 z - 15 = 30

15 z = 30+ 15

15z = 45

z= 45/ 15

z= 3

Mkey [24]3 years ago
3 0

Answer:

5

Step-by-step explanation:

Substitute the value of the variable into the equation and simplify.

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Marcos is mixing a solution in science class. He is mixing 3 ounces of food coloring with every 8 ounces of water. If he wants a
jonny [76]

Answer:

With the 24 ounces of water he would have 9 ounces of food coloring.

Step-by-step explanation:

For ever 8 ounces of water there is 3 ounces of food coloring so if there is 24 ounces of water that mean there is 3 times the original starting amount. So 8x3=24 so there is 24 ounces of the water. Since the8 got multiplied by 3 that means the 3 we haven't used yet will get multiplied by 3 as well so we can find the answer. So 3x3=9. That means we would have 9 ounces of food coloring with the 24 ounces of water.

7 0
3 years ago
Maria and edwin have 23.00 each to spend at a book fair where all students receive 25% discount. They both want to purchase a co
Bezzdna [24]
Both Maria and Edwin are correct

Maria's method
25% of 26.50 = 6.625
26.50 - 6.625 = 19.875
10% of 19.875 = 1.9875
19.875 + 1.9875 = 21.8625 as final price

Edwin's method
75% of 26.50 = 19.875
110% of 19.875 = 21.8625 as final price

The book is 25% off the original price, so the remaining value is 75% of the original value
By adding 10% tax on to the original price, the final price will be 100%+10%=110% of the original price

Both Edwin and Maria has enough money to purchase the book
5 0
3 years ago
What is the constant variation?
masya89 [10]

Answer:

-2/5

Step-by-step explanation:

The constant of variation is k  in y= kx

We need to get the equation in this form

y/x = -2/5

Multiply each side by x

y/x*x = -2/5 x

y = -2/5 x

The constant of variation is -2/5

5 0
4 years ago
Read 2 more answers
Is x equals 12 a solution to the equation 6 + x = 19​
lara [203]

Answer:

13

19 minus 6 is equal to 13 so your answer would be thirteen

4 0
3 years ago
V3
valentinak56 [21]

Question:

The angle \theta_1 is located in Quadrant III, and sin(\theta_1) = - \sqrt{\frac{3}{2}}.

What is the value of cos(\theta_1) ?

Express your answer exactly. cos(\theta1) = ________

Answer:

cos(\theta_1) = - \frac{1}{2}

Step-by-step explanation:

Given:

sin(\theta_1) = - \sqrt{\frac{3}{2}}

Since the angle \theta_1 is located in Quadrant III, we have:

sin(\theta_1) = sin(\pi + \frac{\pi}{3})

\theta_1 = \pi + \frac{\pi}{3}

\theta_1 = \frac{4 \pi}{3}

Thus, cos(\theta_1) =

cos(\theta_1) = cos(\pi + \frac{\pi}{3})

cos(\theta_1) = -cos(\frac{\pi}{3})

cos(\theta_1) = - \frac{1}{2}

3 0
4 years ago
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