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Sindrei [870]
3 years ago
13

79 x 52 = 46 x 34 =28 x 70 =59 x 31 =62 x 45 =87 x 16 =39 x 20 =​

Mathematics
1 answer:
romanna [79]3 years ago
8 0

Answer:

79×52=4,108

46×34=1,564

28×70=1,960

59×31=1,829

62×45=2,790

87×16=1,392

39×20=780

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Five added to a number gives the sum of 39. what is the unknown number?
gregori [183]

Answer:

The unknown number is 34.

Step-by-step explanation:

x+5=39

x=39-5

x=34

6 0
4 years ago
Last year, Jason's average in math was a 72. This year, his average is a 90. What is the percent increase in Jason's grade?
slamgirl [31]

Answer:

20% increase

Step-by-step explanation:

All you have to do is divide 72 by 90n and it will give you .8, move the decimal two places to the right to give you 80 and subtract 80 from 100 to get 20

7 0
3 years ago
In a right triangle ABC, CD is an altitude, such that AD=BC. Find AC, if AB=3 cm, and CD= root 2 cm.
Nata [24]

Given CD is an altitude such that AD=BC , AB=3 cm and CD= √2 cm.

Let AD=x, Since given AB=3

                                     AD+DB=3

                                       x+DB = 3

                                        DB = 3-x

Since ΔBCD is rght angle triangle, let's apply Pythagoras theorem

BC^{2} = DB^{2} +CD^{2}

BC^{2} = (3-x)^{2} +(\sqrt{2} )^{2}

BC^{2} =(3-x)^{2} +2

Since given AD=BC,let us plugin BC=x in above step.

x^{2} =(3-x)^{2} +2

x^{2} =9-6x+x^{2} +2

6x=11

x=\frac{11}{6}

Now we know AD=x=\frac{11}{6} and given CD=√2.

Let us apply Pythagoras theorem for ΔACD

AC^{2} =AD^{2} +DC^{2}

AC^{2} = (\frac{11}{6} )^{2} +(\sqrt{2} )^{2}

AC^{2} =\frac{193}{36}

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3 years ago
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6 0
4 years ago
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swat32

Total length of the fabric is 6\frac{2}{3} =\frac{20}{3}

We need to find the number of scarves can she make if she needs 5/6 of a yard for each scarf.

Let she needs x scarves. So, ATQ

Hence, she can make 8 scarves.

5 0
3 years ago
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