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drek231 [11]
3 years ago
6

If M = 5x2 + 7x-4 and N = -3x2-4x+5, then M -N equals

Mathematics
1 answer:
Yuki888 [10]3 years ago
6 0

Answer:

M-N=4

Step-by-step explanation:

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The scores on a math test are normally distributed with a mean of 64 and a standard deviation of 8. Tara scored 52 on the test.
Dvinal [7]
A z-score<span> is the number of standard deviations from the mean a data point is.
</span>
Standard deviation explains by how much the members of a group differ from the mean value for the group.
Using the z-score formula:
                                           z = ( x  - μ ) ÷ σ
Where;
            x = score
            μ = Mean
            σ = Standard deviation 

Z- Score (Tara) = ( 52 - 64 ) ÷ 8
                         = - 12 ÷ 8
                         = - 1.5 

Z- Score (Jamal)  = ( 82 - 64 ) ÷ 8
                             = 18 ÷ 8
                             = 2.25 

Z- Score (Samuel) = ( 66 - 64 ) ÷ 8
                               = 2 ÷ 8
                               = 0.25
6 0
3 years ago
Help me !?! I don’t get it
emmasim [6.3K]

Answer:

11) x = 11

12) x = 11

Step-by-step explanation:

11) Δ RQP and Δ RLK are similar.

Hence, the ratios of the corresponding sides of the two triangles will be constant.

So, \frac{RK}{PR} = \frac{RL}{QR}

⇒ \frac{x - 4}{49} = \frac{11}{77}

⇒ \frac{x - 4}{49} = \frac{1}{7}

⇒ x - 4 = 7

⇒ x = 11 (Answer)

12) Δ QRS and Δ QDC are similar.

So, \frac{QD}{QR} = \frac{QC}{QS}

⇒ \frac{2x - 14}{32} = \frac{6}{24}

⇒ 2x - 14 = 8

⇒ 2x = 22

⇒ x = 11 (Answer)

5 0
3 years ago
TV=3x-24 and VX=2x+1. What is the value of VX?<br> 1. 25<br> 2. 99<br> 3. 5<br> 4. 51
Maslowich
ΔTXV is an <span>isosceles triangle because ∡T = ∡X therefore TV = VX.

3x - 24 = 2x + 1    |subtract 2x from both sides

x - 24 = 1    |add 24 to both sides

x = 25
</span>
7 0
3 years ago
Read 2 more answers
Answer ASAP: What is the set of the four consecutive integers, the largest of which is -234?
Elza [17]
I’m pretty sure the answer is -237, -236, -235, and -234. Because -234 would be the greatest of that consecutive set.
5 0
3 years ago
David has a bag of coins. The bag contains 7 dimes, 2 nickels, and 6 pennies. He will randomly select 2 coins from the bag one a
julia-pushkina [17]
7 out of 17 coin in the bag
7 0
3 years ago
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