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4 years ago

8

Please help

1 answer:

netineya [11]4 years ago

3 0

There were 4 cats and 4 dogs on Monday.
4 * 5.50 = 22
4 * 8 = 32
22 + 32 = 54

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The equation below is a horizontal line. x = 5 <br> true? or false?

ioda

Is X=5 true or false? the answer is that it is true

7 0

4 years ago

Read 2 more answers

• Evaluate the expression 16n+4 when n=5<br><br>

bezimeni [28]

Answer:

84

Step-by-step explanation:

substitute n = 5 into the expression

16n + 4

= 16(5) + 4

= 80 + 4

= 84

4 0

1 year ago

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URGENT. <br>Q) 18, 19, 20

notsponge [240]

18. s = 5r^2 + 7......making r the subject
s - 7 = 5r^2
(s - 7) / 5 = r^2...by taking the sqrt of both sides, it eliminates the ^2
( sqrt (s-7)/5) = r

19. h = ut - 1/2gt^2....u = 100, t = 1 4/5(or 9/5)...g = 6.4
h = (100)(9/5) - 1/2(6.4)(9/5^2)
h = 180 - 1/2(6.4)(3.24)
h = 180 - 3.2(3.24)
h = 180 - 10.368
h = 169.632 or 169 79/125

20. sorry..do not know this one

4 0

3 years ago

Read 2 more answers

A coin weights about 14^-2 pounds. Find the weight of 1000 of coins. Round your answer to the nearest tenth.

yuradex [85]

Answer:

5.1

Step-by-step explanation:

14^-2*1000

7 0

3 years ago

Calculate an estimate of a square root of 119 + 120i

uysha [10]

Answer:

Step-by-step explanation:

Given

z=119+120 i

Let $\sqrt{119+120 i}=p+iq$

Squaring both sides

$119+120 i=p^2-q^2+2ipq$

Comparing real and imaginary part

Re(LHS)=Re(RHS)

$119=p^2-q^2$ -----------1

comparing Im(LHS)=Im(RHS)

120=2pq

$q=\frac{60}{p}$

Substitute q in 1

$119=p^2-(\frac{60}{p})^2$

$p^4-119p^2-(68)^2=0$

Let $x=p^2$

$x^2-119x-4624=0$

$x=frac{119\pm \sqrt{119^2+4\times 4624}}{2}$

$x=\frac{119\pm 180.71}{2}$

we take only Positive value because $p^2=x$

x=149.85

$p^2=149.85$

thus $p=\pm 12.24$

$q=\mp 4.90$

thus $\sqrt{119+120 i}=\pm (12.24+i 4.90)$

6 0

4 years ago