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sweet [91]
3 years ago
7

Find the value of

Mathematics
1 answer:
Likurg_2 [28]3 years ago
8 0
F(-9)
f(x)=-5x-2
     =-5(-9)-2
     =45(-2)
     =90
g(-2)
g(x)=3xsquared-21x
      =3(-2squared)-21(-2)
      =3(4)+42
      =12+42
      =54
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Square root of 87 to the nearest 10th
kogti [31]

Answer:

9.3

Step-by-step explanation:

Step 1: Calculate. We calculate the square root of 87 to be: √87 = 9.32737905308882.

Step 2: Reduce. 9.32.

Step 3: Round. Round 9.32 so you only have one digit after the decimal point to get the answer: 9.3.

3 0
3 years ago
What is x. PLEASE HELP NEED ANSWERS NOW. M=​
Agata [3.3K]
2(6x+20) +2(8x-16)=180
12x+16x+40-32=180
28x+8=180
X=180-8/28=6
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4 0
3 years ago
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PLEASE SOMEONE HELPP PLEASE PLEASE HELP
BartSMP [9]

Answer:

The addition rule for probabilities describes two formulas, one for the probability for either of two mutually exclusive events happening and the other for the probability of two non-mutually exclusive events happening.

The first formula is just the sum of the probabilities of the two events. The second formula is the sum of the probabilities of the two events minus the probability that both will occur.

3 0
3 years ago
31)The scale on a map shows that 5 centimeters = 2 kilometers.
Sonbull [250]

Answer:

13.5 cm

Step-by-step explanation:

if 5 cm is 2 km, then 10 cm is 4 km. To find one km you do half of 5 cm. which is 3.5 cm. So 10+3.5=13.5

8 0
3 years ago
A rectangular box has length x and width 3. The volume of the box is given by y = 3x(8 – x). The greatest x-intercept of the gra
CaHeK987 [17]

Consider rectangular box with

  • length x units (x≥0);
  • width 3 units;
  • height (8-x) units (8-x≥0, then x≤8).

The volume of the rectangular box can be calculated as

V_{box}=\text{length}\cdot \text{width}\cdot \text{height}.

In your case,  

V_{box}=3\cdot x\cdot (8-x).

Note that maximal possible value of the height can be 8 units (when x=0 - minimal possible length) and the minimal possible height can be 0 units (when x=8 - maximal possible length).

From the attached graph you can see that the greatest x-intercept is x=8, then the height will be minimal and lenght will be maximal.

Then the volume will be V=0 (minimal).

Answer: correct choices are B (the maximum possible length), C (the minimum possible height)

7 0
3 years ago
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