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Dvinal [7]
3 years ago
9

Evaluate (-3)x(5-7)-(39/3)

Mathematics
2 answers:
Firdavs [7]3 years ago
8 0

Answer:

-7

Step-by-step explanation:

(-3)x(5-7)-(39/3)= -3x(-2)-13= 6-13 = -7

Rina8888 [55]3 years ago
6 0
The answer should be -7.
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One side of a square is 10 units. Which is greater, the number of square units for the área of the square or the number of units
ValentinkaMS [17]
The area of the square would be greater. To get the area of a square you need to multiply the length and width of the square, therefore you would multiply 10x10 which comes out to be 100. The perimeter would only be 40.
3 0
3 years ago
Read 2 more answers
Help find the missing lengths round to nearest tenth
Mama L [17]

Answer:

<h2>x = 20.8</h2><h2>y = 22.3</h2>

Step-by-step explanation:

  • Theta is 21 degrees
  • x is the adjacent side
  • 8 is the opposite side
  • y is the hypothenuse

SOH - CAH - TOA

Since the opposite side is given and we need to find the length of the adjacent side, we can use tangent to solve for x.

tan 21=\frac{opposite}{adjacent} \\tan 21 =\frac{8}{x} \\0.384 =\frac{8}{x} \\0.384x =8 \\x=\frac{8}{0.384} \\x=20.84

Since the opposite side is given and we need to find the length of the hypotenuse, we can use sine to solve for y.

sin 21=\frac{opposite}{hypotenuse} \\sin21 =\frac{8}{y} \\0.358 =\frac{8}{y} \\0.358y=8 \\y=\frac{8}{0.358} \\y=22.32

6 0
3 years ago
Please solve for x on numbers 14-18!!
prohojiy [21]

Answer:

14.)x=7

15.)x=252

16.)x=4

17.)x=3/4

18.) [in the picture]

3 0
4 years ago
I have to make the equation equal but I don’t know how to make the H equal but you can’t change the chemical formula
Firdavs [7]

Answer:

Ca(OH)2 + 2 HBr = CaBr2 + 2 H2O

Step-by-step explanation:

Is it H2O2 on the right side and HBr2 on the left side?

Then there is no solution.

I think the formula must look like

Ca(OH)2 + HBr = CaBr2 + H2O

You have 2 Br on the right side then it must be 2 HBr on the left side.

Ca(OH)2 + 2 HBr = CaBr2 + H2O

You have 4 Hs and 2 Os on the left side then it must be 2 H2O on the right side.

Ca(OH)2 + 2 HBr = CaBr2 + 2 H2O

Now everything looks fine.

4 0
3 years ago
The first term of an arithmetic sequence is -30 and the common difference is 8. Find the 20th term.
Sedaia [141]

Answer:

122.

Step-by-step explanation:

nthe term = a1 + d(n - 1) so here:

20th term = -30 + 8(20 - 1)

- 30 +  152

= 122.

4 0
3 years ago
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