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Ierofanga [76]
3 years ago
13

Yoku is putting on sunscreen. He uses

Mathematics
1 answer:
aleksley [76]3 years ago
4 0
For this case we can make the following rule of three:
 2 ml -------------> 50cm ^ 2
 c -----------------> 325 cm ^ 2
 From here, we clear the value of c.
 We have then:
 c = (325/50) * (2)
 c = 13 ml
 Answer:
 
I need 13 milliliters of sunscreen to cover his skin.
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(2x+10)+(2x-30) please help me
Sonja [21]

Answer:

4x-20

Step-by-step explanation:

2x + 2x =4x

10 + (-30) = -20

put it together!

4x-20

(i hope thats the answer form u were asking for) xoxo raina

6 0
3 years ago
Read 2 more answers
NEED ASAP 100 POINTS!!!!!!!!!
Charra [1.4K]

Answer:

3) a. f(-4) = 2

   b. f(0) = 0

   c. f(3) = -1.5

   d. f(-5) = 0

   e. x = -4

    f. x= 0

4) a. f(-1) = 1

   b. f(3) = -1

   c. 1

   d. -5

5) f(6) = 2

   f(2) = 4

   f(0) = 7

   f(5) = 1.5

    x=4

7 0
3 years ago
Read 2 more answers
The number of hours that a nine month old baby sleeps at night are normally distributed with a population standard deviation of
finlep [7]

Answer:

The margin of error for a confidence interval for the population mean with a 90% confidence level is 0.53 hours.

Step-by-step explanation:

We have that to find our \alpha level, that is the subtraction of 1 by the confidence interval divided by 2. So:

\alpha = \frac{1-0.9}{2} = 0.05

Now, we have to find z in the Ztable as such z has a pvalue of 1-\alpha.

So it is z with a pvalue of 1-0.05 = 0.95, so z = 1.645

Now, find the margin of error M as such

M = z*\frac{\sigma}{\sqrt{n}}

In which \sigma is the standard deviation of the population and n is the size of the sample.

In this quesstion:

\sigma = 1.5, n = 22

So

M = 1.645*\frac{1.5}{\sqrt{22}} = 0.53

The margin of error for a confidence interval for the population mean with a 90% confidence level is 0.53 hours.

4 0
3 years ago
What would x be for this to be true -4x=5
Rom4ik [11]

Answer:

x = -5/4

General Formulas and Concepts:

<u>Pre-Algebra</u>

Order of Operations: BPEMDAS<u> </u>

  1. Brackets
  2. Parenthesis
  3. Exponents
  4. Multiplication
  5. Division
  6. Addition
  7. Subtraction
  • Left to Right  

Equality Properties

  • Multiplication Property of Equality
  • Division Property of Equality
  • Addition Property of Equality
  • Subtraction Property of Equality<u> </u>

<u>Algebra I</u>

  • Terms/Coefficients

Step-by-step explanation:

<u>Step 1: Define</u>

-4x = 5

<u>Step 2: Solve for </u><em><u>x</u></em>

  1. [Division Property of Equality] Divide -4 on both sides:                                -4x/-4 = 5/-4
  2. Simplify:                                                                                                             x = -5/4
3 0
3 years ago
Read 2 more answers
For f(x) = 4x2 + 13x + 10, find all values of a for which f(a) = 7.
sammy [17]

Answer:

0.84

Step-by-step explanation:

4x2+13a+10=7

13a=7-10-8

13a=-11

a=-11:13

a=0.84

4 0
3 years ago
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