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creativ13 [48]
3 years ago
7

What is 2/3 + 1/4*please help*

Mathematics
2 answers:
Tcecarenko [31]3 years ago
6 0
\frac{2}{3}+\frac{1}{4}

Re-write with a common denominator, in this case 12:

\frac{2 \times 4}{3 \times 4}+\frac{1 \times 3}{4 \times 3}
\frac{8}{12}+\frac{3}{12}

Add:
\frac{8}{12}+\frac{3}{12} = \frac{11}{12}
Nezavi [6.7K]3 years ago
3 0
First, we need a common denominator. The lowest number with both 3 and 4 (our current denominators) as factors is 12. To make the denominator of each fraction 12, we will use multiplication. 

(2/3 * 4/4) + (1/4 * 3/3)
8/12 + 3/12

Now, we can simply add the numerators.

8/12 + 3/12 = 11/12
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LiRa [457]

Answer:

x=4.8

This here you use Pythagorean Theorem.

Step-by-step explanation:

a^2+b^2=c^2

The longest side is c. And the two legs are a and b.

So it'd be 11^2+x^2=12^2

121+x^2=144

Subtract 121 from both sides.

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Then take the √ of x^2 and 23

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Hope this helps

5 0
3 years ago
Evaluate the expression 3x² + 2x - 4 for x =-2.
marin [14]

Answer:

4

Step-by-step explanation:

3x² + 2x - 4

3(-2)² + 2(-2) - 4

3(4) - 4 - 4

12 - 4 - 4

12 - 8

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4 0
3 years ago
A survey of an urban university (population of 25,450) showed that 870 of 1,100 students sampled supported a fee increase to fun
Katen [24]

Answer:

95% confidence interval for the proportion of students supporting the fee increase is [0.767, 0.815]. Option C

Step-by-step explanation:

The confidence interval for a proportion is given as [p +/- margin of error (E)]

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n is sample size = 1,100

confidence level (C) = 95% = 0.95

significance level = 1 - C = 1 - 0.95 = 0.05 = 5%

critical value (z) at 5% significance level is 1.96.

E = z × sqrt[p(1-p) ÷ n] = 1.96 × sqrt[0.791(1-0.791) ÷ 1,100] = 1.96 × 0.0123 = 0.024

Lower limit of proportion = p - E = 0.791 - 0.024 = 0.767

Upper limit of proportion = p + E = 0.791 + 0.024 = 0.815

95% confidence interval for the proportion of students supporting the fee increase is between a lower limit of 0.767 and an upper limit of 0.815.

5 0
3 years ago
A nurse opens a case that has a total of 160 ounces of med. If each vial in the case holds 1 1/3oz of medication how many vials
uysha [10]

Answer:

120 Vials

Step-by-step explanation:

160/1and1/3

160/4over3

Multiply top by 3

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120

4 0
1 year ago
ABC is equal to DEF. what angle corresponds to angle B?
gregori [183]

Angle B corresponds to ANGLE E.

You can simply tell by looking at the letters that are arranged.

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Hope this helps

8 0
3 years ago
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